Why Super Smash Bros. Brawl Can't Be Played on PSP

Impossible. Super Smash Bros. Brawl is a Nintendo Wii exclusive (2008). The PSP (Sony, 2004) is a completely different architecture.

Hard Barriers

• Instruction Set: Wii = PowerPC (Broadway). PSP = MIPS (Allegrex). Machine code is mutually unintelligible.
• GPU / APIs: Wii uses GX (fixed-function + TEV). PSP uses GU (programmable vertex/fragment). No translation layer exists.
• Media: Wii = 12cm DVD (4.7/8.5 GB). PSP = UMD (1.8 GB) / Memory Stick. Brawl is 8.5 GB (dual-layer).
• Input: Brawl designed for GameCube/Wii Remote/Classic Controller. PSP has no analog stick (until 2000/3000), no motion, fewer buttons.
• Copyright: Nintendo IP on Sony hardware = legal nuclear winter.

What *Is* Possible

• PSP Fighting Games: Tekken 6, Street Fighter Alpha 3 MAX, BlazBlue: Calamity Trigger, Dissidia Final Fantasy (arena fighter).
• Homebrew Smash Clones: Super Smash Flash (Flash, not PSP), Brawl Minus (Wii mod). No playable PSP port exists.
• Emulation (Other Direction): Wii can emulate PSP (PPSSPP). PSP cannot emulate Wii (100x too slow).

Don't waste time searching for "Brawl PSP ISO"—it's malware bait.