Mechanica

Mechanica is a playable Character from the 2017 Fighting Game ARMS.

Subspace 2:
She was captured by the Neo Subspace Army during their amnesia plan. It worked on her and she had gotten amnesia, and couldn't remeber anything.

She eventually befriends the mythtical Pokemon, Zeraora, who gives her the identity of Serene Higashikata.

Mechanica/Serene eventually crosses paths with Dante, Kakashi, and Blake and teams up with them for a couple of chapters, and then temporarily defecting from them. She sometimes shows up to help them, such as helping Dante escape from the Toon Patrol.