the most easy way is to complete the game mode.

yer but u could do brawl and unlock snake and sonic

have evry single charactor join you on your team in the SSE and beat it then go back to
SSE to get toon link wolf and jigglypuff (i forgot where to get them)

..... That's where I've seen their location.

Use your laptop! (^_^)

forest swamp ruins new doors wolf ruins forest toon link swamp jigglepuff