dan has 2 semi infinites and many versions of it.
first ones i the gadoken semi infinite
you can start it by:
c. lk, c. lk, lp gadoken cancel into super gadoken
keep doing super gadokens
you can also do it from a tag in hit
just juggle them when they hit the ground then do a super gadoken.
the other one is alot better the kouryu rekka semi
you can use any number of assists but the trick is to have the opponent in the air when you do the 2nd uppercut
just lk (call hulk dash assist) lk, kouryu rekka (they should soar into the air)
dash foward and time it so both hits connect on the character BEFORE they hit the ground.
repeat,
it does alot of damage you should kill them in 4 supers (does 120 damage with 3 of them).
you can also juggle when they hit the ground but it’s alot harder to do multiples of it, and you will prolly just be doing a OTG (which means they can roll) its’ better to catch them in the air before they land.
you can also just get them in the gadoken semi infinite dash under and do both hits in some circumstances but the trick is to make them bounce up or be a little higher in the air if your going for it in from super gadoken set up.
you can also do the tag in set up (tag in , c. lk when they come down (juggle) into kou semi)
I take no credit for these infinites.
a bread and butter dash in would be
dash in lk, lk lp gadoken