Other mistake: There is no way for Eddie to enter cheat codes, and no way for his real-life vehicle to teleport or to go faster than it already could.
Other mistake: When Matty and Sam are having a conversation about modern games vs older games, Matty is playing a game on a Playstation 4 but the controller isn't on.
Answer: She was a pixel but turned into an ordinary person. Probably to make the fight look epic.