So would that affect his Regenerationn? On the other hand, Helios regenerated (Supposedly) from the deleted world of Bakugan Interspace, and Drago was comparable to him even before he evolved to Fusion Dragonoid. So it would make sense if he had similar stats/abilities to him. We should probably wait for more imput though.
Also, hate to be the one to oppose this haha, but Season 1 protagonist Bakugan (Skyress, Tigrerra, etc) are constantly portrayed as being weaker than all of the other seasons (As shown from Alice vs Shadow/Runo vs Mira and overall Helios soloing all of them from the very first episode). So personally I'd say them being able to harm the guardians is just PIS. As for them being able to harm Mechtavius Destroyer, he seemed more annoyed by that attempt to hurt him than actually damaged, but I'm not as sure about that. If we make them 2C though, then literally every bakugan will probably be 2C - Helios solo'd them, so everyone Helios battled would be 2C, and every bakugan they battled would be 2C etc.