I don't think there's much more Teddy can forget

the disadvantage of such an early canon point :

unless I really want him to panic in which case he could just forget how to shift

not that he can, just the how of it

because for Teddy it's sort of something that's always there

it's part of him

forgetting how to shift is almost the same as like... forgetting how to use his arm

at least for him

oh no

he would be so miserable but trying not to make a big deal out of it when everyone else is forgetting really important things

and if Chi goes ahead with Billy forgetting Teddy, ow

his mom's not there, his team isn't there, no shifting and no boyfriend... that's pretty much everything stable gone

one of my headcanons for Teddy is that because he already has that extra level of control

losing control is basically one of his worst nightmares

this wouldn't be a big loss of control really, in that he'd just stop knowing how rather than have his shifting actually turn on him, but he would be a bit of a mess