The headbutt is partitioned. Its kinda advanced, but you’ll get the hang of it
After first LK Tackle, when you do sphere, don’t press QCF + Jab then charge back for the whole thing, like you usually would. There is a technique. Kinda tricky, but you do the QCF + Jab, then instead of holding back as usual, you hold back for a second, then shift the charge to downback, so you ready the headbutt but don’t lose the tackle charge., get it?
Basically, during the sphere you’d start charging back for tackle? But, this way, instead of charging back for the whole sphere, you start charging back for a bit, then shift to downback, meaning you don’t overcharge the headbutt(partitions cannot be overcharged!) I advise you shift to downback near the end of the sphere animation, or in the middle, cause if you start charging downback too early in the sphere animation, you overcharge, which means no headbutt
cr.Fierce, LK Tackle, Jab sphere(charge back during start of animation then shift to downback in middle of animation or near the end), LK/MK Tackle, Headbutt(Instant)