Tubba's Heart Skips a Beat, Aarantula

Odd Turn, Unique Items / Actions
HP Plus x2, FP Plus, Mega Rush, Power Bounce, Double Dip, Power Rush, Power Jump, HP Drain = 18 BP
T1a: Double Dip Egg Missile + Thunder Bolt (11), Shell Shot (16)
T1b: Heart Charge. HP: 20, FP: 4
T2b: Heart Attack. HP: 8, FP: 4
T3a: Shroom Fry, Switch to Goombario
T3b: Heart Charge. HP: 14, FP: 6
T4a: Heart Attack (Merlee). HP: 5, FP: 6
T5a: Power Jump (23, Heal 1 HP), Charge. HP: 6, FP: 3
T5b: Tackle. HP: 1, FP: 3
T6b: Heart Charge
T7: Headbonk (31), 4-Hit Power Bounce (45, Flee)
ADDENDUM: You can substitute HP Drain for Damage Dodge and deal exactly 50 damage to the heart, but it'll still flee anyway. I just wanted to use HP Drain because we're fighting a literal heart.
I had a lot of different ideas for strategies including a 4 turn Mario Alone fight, a super quick fight without any restrictions that ends in 2 turns, and other variations of odd turn that use a Volt Shroom and more Tayce T's recipes through Mysteries for more stat recovery variety, but it really was not worth it when I realized just how perfectly a simple Shroom Fry fits into this. It also allowed me to use Double Dip only once and that seems more fitting given my restrictions anyway.

[@Gibstack]

There is a(nother) really good bait and switch here when you heal to 14 HP, and it looks like you're going to be hit for 12 damage to 2HP. Surprise Merlee instead to a perfect 5HP. Awesome