How old manic the hedgehog?

There is no character named "Manic the Hedgehog" in the official Sonic the Hedgehog canon. It is possible you are thinking of Manic the Hedgehog from the Archie Sonic the Hedgehog comics, who is a younger brother to Sonic and Tails. However, due to the complex nature of Sonic's multi-faceted lore, it is difficult to give a definitive age for Manic.

Here's why:

* Archie Comics: Manic was originally created for the Archie Sonic comics, which had its own separate continuity from the main games. In these comics, his age is never definitively stated, but he is portrayed as younger than Sonic, making him likely around 14-16 years old.

* No Official Canon: Manic has not been incorporated into the official Sonic games, meaning his age and backstory are not considered canon by Sega.

Therefore, it is impossible to state a definitive age for Manic the Hedgehog. However, based on his depiction in the Archie comics, he is likely around 14-16 years old.