Which Ultra Beast is the strongest?

1 Nihilego

Nihilego takes the crown for most dangerous Ultra Beast because it can, theoretically, assume the form of any and all prior competitors. Picture a Buzzwole, infested by Nihilego. Once its strength is exhausted, Nihilego moves on to Guzzlord, then Zurkitree, then whoever suits its follow-up purposes the best.

Contents

Is Guzzlord Pikachu?

Guzzlord (Japanese: アクジキング Akuziking) is a dual-type Dark/Dragon Pokémon introduced in Generation VII.

Pokédex entries.

This Pokémon has no Pokédex entries in Let’s Go, Pikachu! and Let’s Go, Eevee!‎.
Ultra Moon	An unknown life-form called a UB. It may be constantly hungry—it is certainly always devouring something.

Does Ash have an Ultra Beast?

Naganadel is the first Ultra Beast owned by Ash.

What Ultra Beast did Ash save?

Naganadel was a Pokémon Ash caught in the Alola Region and his only Ultra Beast he kept with him for a long time before it returned to its homeworld after Ultra Necrozma restored its world.

Which Ultra Beast is the strongest? – Related Questions

Why did Ash release Solgaleo?

Ash has opportunities to capture it properly, as he did with another Ultrabeast Poipole, but he opts not to make it official. Instead, he bids farewell to Solgaleo after they all band together to defeat Necrozma.

What happened Ash Buzzwole?

Ash eventually succeeded in catching Buzzwole with a Beast Ball, allowing it to be returned home through another Ultra Wormhole soon after. It reappeared in a flashback in Love at First Twirl!.