Patch: Alphabetical Rage Checklist Addendum

No, 55 Siegfried and 64 Chupon are the ones you fight in the Coliseum... So they will not get a Rage, because Coliseum battles do not count towards Rage.

305 Siegfriend and 303 Chupon are the ones you fight normally, on the Phantom Train and on the Airship Deck, and since they are past 254 (or 255 with the Pugs fix applied), they will not go on the Rage list.

I said I downloaded a patch that let Siegfried, Chupon, & Allo Ver. http://www.rpglegion.com/ff6/hack/rage.htm

Are you saying the bosses 305 Siegfried & 303 Chupon appear in the veldt, but they can't appear in Veldt due to being above 255 slot.

Oh okay, yeah that 'Rage Patch' seems to allow the 55 and 64 Colosseum ones to go onto the Veldt (after fighting them) in order to encounter them and get their Rage.
Hmm... maybe the 'Rage Checklist' patch does not take into account the other 'Rage Patch'? I'm not entirely sure. Perhaps @SilentEnigma can shed some light on this more.