Coliseum normal battle

Subroutine $CACFBD is the commonly used one that heals all HP/MP/Statuses except M-Tek & Dog Block.
That's the one you'd want to put into the code following Madsiur's example.
That subroutine goes to, you guessed it, CA/CFBD, which does all this:

Code:

CA/CFBD: 88    Remove the following status ailments from character $31 (Party Character 0): Float, Hide, Chant (Casting Spell), Morph (Esper-form), Instant Death Protection, Frozen, Rage, Death (Wound), Petrify (Stone), Imp, Vanish (Clear), Poison, Zombie, Dark
CA/CFC1: 88    Remove the following status ailments from character $32 (Party Character 1): Float, Hide, Chant (Casting Spell), Morph (Esper-form), Instant Death Protection, Frozen, Rage, Death (Wound), Petrify (Stone), Imp, Vanish (Clear), Poison, Zombie, Dark
CA/CFC5: 88    Remove the following status ailments from character $33 (Party Character 2): Float, Hide, Chant (Casting Spell), Morph (Esper-form), Instant Death Protection, Frozen, Rage, Death (Wound), Petrify (Stone), Imp, Vanish (Clear), Poison, Zombie, Dark
CA/CFC9: 88    Remove the following status ailments from character $34 (Party Character 3): Float, Hide, Chant (Casting Spell), Morph (Esper-form), Instant Death Protection, Frozen, Rage, Death (Wound), Petrify (Stone), Imp, Vanish (Clear), Poison, Zombie, Dark
CA/CFCD: 8B    For character $31 (Party Character 0), take HP and set to maximum
CA/CFD0: 8B    For character $32 (Party Character 1), take HP and set to maximum
CA/CFD3: 8B    For character $33 (Party Character 2), take HP and set to maximum
CA/CFD6: 8B    For character $34 (Party Character 3), take HP and set to maximum
CA/CFD9: 8C    For character $31 (Party Character 0), take MP and set to maximum
CA/CFDC: 8C    For character $32 (Party Character 1), take MP and set to maximum
CA/CFDF: 8C    For character $33 (Party Character 2), take MP and set to maximum
CA/CFE2: 8C    For character $34 (Party Character 3), take MP and set to maximum
CA/CFE5: FE    Return

If you wanted to remove just poison and nothing else, then you'd have to make your own subroutine that does that because there is no preexisting one that removes just poison...so hopefully you are okay with removing all negative statuses, and restoring max HP/MP. If not, the value for just poison is going to be $04.

Odd. Why is my CA/CFBD up to CA/CFF2 that remove status are only MagiTek & Interceptor? But more importantly, any change (ticking dark, poison, & etc) to these codes does nothing before the coliseum fight.