The most powerful Fake out you'll ever see.

Technician boosted, STAB, Choice Banded-crit?

Life orb*

STAB + Critical Hit + Technician Boost + Roserade's low physical Bulk (Her Roserade has 155HP and 86 Def) + Ambipom's level advantage (And probably some other values like Nature, IVs and EVs) So yeah it's not that surprising it did OHKO the Roserade

You beat Cynthia with the wrong monkey but still beat her

Am sorry what what in the name of arceus did I just witnessed

Ambipom:

Ambipom is imo hella underrated. I used one in Showdown, and have it use a Normal Gem Technician boosted Fake Out. As long as the opposing Pokémon didn’t resist it, it usually did solid damage.

Imagine if that was Normal Gem boosted...