Pokemon: ThunderYellow Version (2026 Special Edition)

SVS Lab • Delta save-state editor • Local & offline • v2.37

Made for our FireRed / LeafGreen build

01 • Import

Open your Delta save state

Select a ThunderYellow .svs file. Everything stays on your device.

📁

Tap to choose an .svs fileOr drop a file here on a computer

02 • Inspection

Snapshot integrity

Delta: An edited .svs is a save state, not a cartridge .sav save file. In Delta, import it as a Save State, then choose Menu → Load State and tap that imported state. Simply reopening the ROM or choosing the game's Continue option loads a different in-game save.

Trainer identities

Player & Rival Names

Edit either name in the loaded SVS. FireRed stores up to 7 characters per name. Changes are applied to both verified save copies and matching live memory.

Player name

Rival name

Also update the Original Trainer name on my Pokémon when I rename the player. This keeps them recognized as mine without changing their Trainer ID or Pikachu's identity.

Open an SVS to edit names.

Supported: uppercase/lowercase letters, numbers, spaces and common in-game punctuation. This does not alter the ROM, nickname, Pokémon personality IDs or trainer IDs. Some scripted dialogue may still use fixed names.

03 • Safe edits

Cash, coins & items

Item quantities are encoded using ThunderYellow’s Gen 3 encryption key. Changes are applied to all detected copies.

Cash / Pokédollars (0–999,999)

Import a verified SVS to inspect your wallet.

Casino coins (0–9,999)

Find an item by name or number

Search all named FireRed / LeafGreen items. Tap a match to choose it and its bag pocket.

Select an item before setting its quantity.

Bag inventory

Two different actions: Set Quantity changes how many you have in your bag. Select for PC marks items to move; select the items first, then tap Move Selected to PC. The transfer amount defaults to everything owned and can be changed below.

0 items selected

Item / Select	ID	Owned / New Qty	Edit Qty

Add any numeric item ID

Pocket

Item ID (decimal)

Quantity

Setting a quantity to 0 removes the item and compacts the pocket. Use the game's actual internal item ID, not the Pokédex number. Wrong IDs may be unsupported by this ROM.

🗃️ Item PC storage and Withdraw

The in-game item PC has 30 storage slots. Tap Select for PC beside bag items, then Move Selected to PC. The amount defaults to your owned quantity; edit it in the selection panel. Stored items appear below for withdrawal. Key Items cannot be deposited.

Stored item	Owned	Withdraw quantity	Action

04 • Pokémon manager

Party & PC Pokémon Editor

Edit existing Pokémon directly in your .svs: moves, current PP, PP Ups, experience, friendship, held items, IVs, EVs and battle stats. PC Pokémon may be copied, moved and deleted. The special starter Pikachu is protected from copying or deletion.

📋 Paste Pokémon sets (Showdown / PKMDS format)

Paste one or several complete Pokémon sets, separated by blank lines. Preview the party or PC destination before importing. Level defaults to 100 when omitted; IVs default to 31, and EVs default to 0. Optional SVS Lab lines: # PP: 35 / 40 / 99 / 0 and # PP Ups: 3 / 3 / 3 / 0 (four move slots; PP 0–99, PP Ups 0–3). Or use the one-tap 35/40 buttons.

Pokémon sets

Tap 35 or 40 to fill PP and 3 PP Ups for every nonempty move in the pasted sets. You can also type any current PP from 0–99 into the # PP: line. SVS Lab writes the requested value without a normal move-PP cap; the ROM may still change it during gameplay.

Import action

Import destination

Starting PC box

Starting slot

Allow replacement of occupied, non-protected slots (requires confirmation)

Import is blocked if it would replace our special follower Pikachu, cross the party's six-slot limit, or skip an earlier empty party slot. PC batches can continue into the next box.

Starter shortcut finds your original follower Pikachu even when not in slot 1. Paste multiple Pokémon sets, but only Pikachu’s moves and listed ability will be imported. “Shiny: Yes” and every other set property will be ignored by this shortcut.

📤 Export Pokémon sets for Showdown / Notes

Create a copy-and-paste text list from Pokémon in your currently loaded, verified SVS. This is read-only and never edits the game, party, or save. The list includes levels, abilities, natures, shiny status, items, IVs, EVs, friendship, moves, current PP and PP Ups.

Which Pokémon?

Nickname

Showdown-format output — long-press to select or use Copy

Values reflect saved Pokémon records, including 255-per-stat EVs. Current PP (0–99) and PP Ups (0–3) are exported as # comment lines, which SVS Lab recognizes when reimporting; regular Pokémon Showdown does not preserve them. Unsupported custom moves/items will be labeled as comments instead of guessed.

⚡ Party Builder & Switcher

Build a lineup from the current six party Pokémon and your PC boxes. Save multiple named plans on this device, then activate one to exchange members between party and PC. The original follower Pikachu stays in his current party slot.

🏅 Gym & League Team Coach — Use what you own

Explore 10 battle guides built from Pokémon already in your party and PC. Review recommended levels, counters, moves and real bag resources. No generated Pokémon, automatic leveling, free TMs or save edits.

Choose the next challenge

Build & Swap shows all six positions, which Pokémon return to Bill's PC and how party size changes. Nothing is changed until you confirm. Only your owned Pokémon are used, and original follower Pikachu stays in his fixed position. Export a new SVS for Delta.

These are beginner-friendly advisory level goals, not verified gym level caps or guaranteed wins. Check actual moves and TM compatibility in-game; the coach cannot determine whether a stored Pokémon was caught naturally or added through an editor.

Team name

Saved teams on this device

Switching modifies the working SVS only after confirmation. Party members not selected go into the PC slots vacated by incoming Pokémon. Save plans are stored in this browser, not in your ROM or original save file. Export the updated SVS to test in Delta.

Show Pokémon sprite grid

Experimental build: validates Gen 3 record and flash-section checksums, but has not been tested loading an edited Pokémon state in Delta. Keep your original SVS and check your edited copy in-game before overwriting anything.

05 • Gym badges

Kanto badges

All eight badge flags appear below, including unearned badges. Tap a badge to mark earned or not earned, then choose Save badges.

06 • Pokémon cleanup

Bad Egg scanner & save recovery

Legacy diagnostic scan for suspicious Bad Egg memory patterns. For safe cleanup, use the guided repair button below. The old RAM-only deletion is disabled to protect cartridge saves and party counts.

The legacy RAM scan is a diagnostic only: do not blindly erase a record while the active party count still includes it. Use the guided repair below for a verified snapshot.

🛠 Repair my SVS — Bad Eggs & invalid Pokémon

Works even when SVS Lab opens your snapshot READ-ONLY. Inspects both cartridge save copies, the party and live RAM. For a clearly identified corrupt last party member or confirmed flagged PC Bad Egg, it previews the exact changes and downloads a separate repaired .svs. Normal Eggs and healthy Pokémon stay untouched.

Strict safety rules: no automatic Pokémon creation, no alteration of the original file, no forced repair when evidence disagrees, and no promise that a mid-battle state will safely resume. Use the same ROM build and keep your original .sav and .svs backups.

07 • Advanced

Hex inspection & patching

For controlled follower-logic research or other known ThunderYellow offsets. Raw decompressed file offsets, not GBA ROM addresses.

Open hex editor

Offset (hex or decimal)

Patch bytes (hex)

Manual patches modify only the specified offset; unlike the item editor, they do not synchronize copies. Always record the precise source of an offset.

08 • Export

Download your edited save state

The original upload is never changed. The editor recalculates affected FireRed flash-section checksums and writes a new gzip-compressed .svs snapshot.

Changes made

No changes yet.

ThunderYellow SVS Lab • No upload server, account, advertisements, or external libraries.
Save states are tied to the exact ROM version. This editor does not repair the ROM's follower startup code.

Pokemon: ThunderYellow Version (2026 Special Edition)

Open your Delta save state

⚠ Unsaved or mismatched game state

Snapshot integrity

Player & Rival Names

Cash, coins & items

Bag inventory

Party & PC Pokémon Editor

🏅 Gym & League Team Coach — Use what you own

Add Pokémon to this empty slot

All four moves • PP and PP Ups

Copy, move or delete a PC Pokémon

Kanto badges

Bad Egg scanner & save recovery

Hex inspection & patching

Download your edited save state