What is code lyoko forehead?

Code Lyoko is a French animated TV series that aired from 2003 to 2007. The show revolves around a group of teenagers who discover a virtual world called Lyoko, where they battle against a malevolent artificial intelligence named XANA.

The term "code lyoko forehead" likely refers to one of the main characters, Jeremie Belpois. Jeremie is the leader of the Lyoko warriors and serves as the group's tech expert. He is known for his distinctive forehead, which is large and often the subject of jokes and teasing from other characters. Despite this, Jeremie is a genius and is able to help the team solve complex problems both in the real world and in Lyoko.