Cheat codes for Explorers of Darkness (and Time) require an Action Replay DS cartridge or a flashcart with a cheat database (.xml/.dat). Codes are region-specific (US: APDE, EU: APDP, JP: APDJ).
0223C5D0 0098967F (9,999,999 Poké)0223C5D4 000F423F (999,999)521Axxxx 00000000 / 021Axxxx 000003E7 (complex, often unstable)0223xxxx 00000064 (per Pokémon in party — risky)0223xxxx 00000063 (per slot)021xxxxx 00000064521xxxxx 00000000 / 021xxxxx 00000001Exact addresses vary by version (v1.0/v1.1) and region. Use a curated database:
usrcheat.dat (or cheats.xml) from above sources._nds/TWiLightMenu/cheats/ (TWiLight) or _rpg/cheats/ (Wood).For "Quick Level Up," the legit fastest way is Mt. Bristle / Amp Plains with Mobile Orb + Rare Quality items, or Zero Isle South (post-game) with X-Ray Specs + Escaping. Cheats ruin the core loop: overcoming impossible odds through preparation.