So far:
Pokemon Trainer Red Pokemon Trainer Blue
Battler Ushiromiya Beatrice
Kirby King Dedede
Chell GlaDOS
Phoenix Wright Miles Edgeworth
Riou Jowy Atreides
Ramza Beoulve Delita Hyral
Sora Riku
Travis Touchdown Henry Cooldown
Professor Layton Don Paolo
Siegfried Nightmare
Pesmerga Yuber
Katherine Catherine
--
Oh, I am one yet many.