What are the differences between Ash and Red?
There are lots!



For starters, Red is character who just starred in manga/games, and manga created only after a TV series aired.

As a result, they decided to release two types of manga, one based on the show and one based on the games:


The manga based on games R/B/G/Y, called Pokémon Adventures, which continues the story until the third generation stages.  
And manga based on the series, called Pokémon The Electric Of Pikachu!