Matthias

Matthias is a boy who Catherine the Great befriends in I Am Catherine the Great.

He and Brad Scott join Catherine as "Team Rooster" against "Team Turtle" (Xavier, Yadina and Dr. Zoom)

He is voiced by Lucas Kalechstein.

A boy who appears in I Am Eleanor Roosevelt bears some similarity to him.

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Xavier Riddle and the Secret Museum Wiki

Matthias

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