Excluding Kirby, who is canonically the most powerful Smash character.

Board 8

Xiahou Shake posted...
All of the Xenoblade characters are rightfully in the conversation at their peaks but they only really maintain said peaks for a scene or two at most so I'm not sure how much it counts.

Pyra/Mythra could pretty much transform into Pneuma at will near the end, and Pneuma is probably the strongest character given how she beat Jin and his nonsense.

""Love" is making a shot to the knees of a target 120 kilometers away using an Aratech sniper rifle with a tri-light scope." HK-47