Play as Silver Dural:
Press Start + A + X at the Character select screen in Training Mode.

Play against Alphabet:
Choose Akira on the character selection screen and press Start. Now highlight Lau and press Start. Then highlight Pai, hold Start, and press X to fight against Alphabet.

Play as Alphabet:
Choose Akira on the character selection screen and press Start. Now highlight Lion and press Start. Then highlight Pai and press Start. Then select any character and press A to choose Alphabet.

Alternate costumes:
Hold Start while selecting a character to see their alternate costume.

Slow-mo replay:
Before the instant replay starts, press B to watch it in slow motion.

Thanks to Revolution readers Pedro Victor Losada Cavalcante, Patrick Macleod, and Flash Beefy-T!