It was 4 episodes long
And they offscreened literary 90% of reds story lmao of course they will focus only in 1 pokemon
"I dislike how Origins only gave focus to Charizard, but not because of Charizard. Red's main heroic trait is his love for his PokΓ©mon, but the focus on Charizard (especially the "winning without Charizard would be meaningless" bit) comes across as Red only loving his Charizard."