Секреты Mario (Mario Secrets)

hackerlab

Task: modified Super Mario Bros NES ROM (vanilla mapper-0 engine converted to MMC3 128KB) hiding a flag. Solution: diff PRG banks, disassemble injected 6502 event routines that overlay World 8-4 castle data, then decode SMB area-object (type 0x0A) blocks in bank4 — the flag is DRAWN as orange-brick letters in the level geometry, confirmed in FCEUX. Reads U_DO_IT_BRO.