I'd say Blaziken, but its 2 gens too late. If I were to be realistic, I'd say Zoroark probably.
Considering the 3rd generation hasn't had a playable rep, I wouldn't say Blaziken is that unlikely...I'd personally like to see one 5th gen and one 3rd gen make it in alongside Pikachu and a Pokemon Trainer.
And if the trainer is Red again, then CALL HIM RED!!!
...oh, right. The Pokemon. Umm...I'll say Meloetta. --- ~~~White-Hot Fire-type Specialist!~~~ Pokemon White 2 FC = 4599-7354-7776