DROP
Mew / Mewtwo
ADD
Tom Nook Crazy Redd
Blue Badger Bad Badger
Vyse Galcian
Chocobo Mog
Mario Sonic
Making my complete list:
1. Ifrit Shiva
2. Sora Riku
3. Tidus Jecht
4. Squall Leonhart Seifer Almasy
5. Siegfried Nightmare
6. Amaterasu Orochi *
7. Balthier Dr. Cid
8. Sub-Zero Scorpion
9. Pokemon Trainer Red Pokemon Trainer Blue
10. Mega Man Proto Man
11. Tom Nook Crazy Redd
12. Blue Badger Bad Badger
13. Vyse Galcian
14. Chocobo Mog
15. Mario Sonic
The asterix means it might be subject to change. All else is set in stone.
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Nominate Balthier/Dr. Cid for the Greatest Game Rivalry Contest
Also Tidus/Jecht, Squall/Seifer, Sora/Riku... but mostly Balthier/Dr. Cid :)