Ryuusei no Rockman 3 : Jack Corvus R

I'm doing the challenge where I got to beat all of the R-Version of the bosses within 12 seconds.
He's one of the only two I've not been able to beat. If anyone can assist, please.

that was HELL for me too
use icespin cards when he is in the middle row 2 spaces away from you(when he does that claw attack of his)
Virgo also helps

i defeated all of 'em within 12 seconds it was hard i think dread joker r or acid ace r is the hardest to delete!

Well no worries... I defeated him a little shortly after I put up that comment. Now I got the CosmicRave and waiting on some brother stats, cuz i still need 5 more bros.

This is why you don't use Double Eater on Jack Corvus.

wat is the meteor server access?

It lets you change in to the games ultimate form

u actually almost got your but kicked...

this guy must really be annoying then......

u can switch thats a relief wheres the guys and how can we switch

you know in space, from echo ridge when you first enter space, go to the first transporter (that rushing thing) and then go right. There, a denpa-kun you can find from those dark, interference places that when you talk to him, he will let you change into the form you previously were. Say you were Crovus right now and virgo as your previous transformation. Talk to the guy and he will let you be Virgo. If you want to turn back to Crovus, then talk to him again. Simple. Sorry for the long comment.