She appeared in megaman x and nt warrior at least.but the major difference is that both cornel and iris carry half of a whole cornel in nt warrior, while they were separated in megaman x with an emotional event when zero fought cornel.
That form was only possible because wily injected both elements into megaman. He crossed fuse himself interrupted that process and forced it to directly attach that element to the cross fusion. Obv megaman sustained severe damage that the pet had preserved him as the base model.
Barrel had no interface needed to do it. The pet creation needed for it was in net to world. Had they brought a cross fusion chip and program, they could of used the facility at net to grandfather to activate a field nessary for it.
He hasn’t appeared, but could of had net op there and met his other half learning about cross fusion and the need to share the needed data to materialize.