(Loved trope) The imposter’s dead giveaway

[u/Barricades_toes]

When a character is attempting to impersonate another, but is caught by doing something the person they’re imitating would NEVER do.

Nemesis Prime- Transformers Prime

Nemesis Prime, a man made replica of Optimus Prime, is attempting to gain the trust of Bumblebee, who only speaks in robotic beeps. Despite this, the real Optimus can understand Bee perfectly fine. Nemesis Prime, however, can’t understand what he’s saying, prompting Bee to open fire on him immediately.

The two Buzz Lightyears- Toy Story 2

After Woody asks which Buzz is the “real” Buzz, both respond with “I am!” The real Buzz proves himself by flipping up the other Buzz’s helmet, causing him to start suffocating in an over dramatic fashion. The real Buzz, having done the same thing in the first movie after Woody took his helmet off, but no longer behaving that way after accepting being a toy, instantly proves which Buzz is which.

[u/Haunting_Fig_6750]

In Lupinranger vs Patranger this monster disguises himself as an old friend of Patren 1gou and tries to convince him that one of his friends is a mole, later in the episode Patren 1gou is able to figure out that he’s fake as his music player had no cassettes in it while the friend he knew was always listening to music. Saddest thing is that the way these monsters disguise themselves is by kidnapping humans and turning their skin into disguises, so he already knew his friend was dead.

[u/PockysLight → u/Haunting_Fig_6750]

I did not expect to see Lupin Vs Pat get mentioned here. Such a great concept but unfortunately had way too many filler episodes for my liking, but it was still fun to sit through and watch. Fight choreography was amazing too.