>>35233676>>35233703>>35233773Red had Bulbasaur in:
1- Red/Green artworks
2- Red/Green Guidebook
3- 4koma manga
4- Pocket Monsters manga
5- Pokemon Adventures
6- Pokemon Generations
Also fun fact: Red's Venusaur is the only one with Z-Item in Sun/Moon.
Red had Charmander in:
1- Pokemon Zensho
2- Pokemon Origins
Red has Pikachu in:
1- anime (as Ash)/Pokemon Yellow
Bulbasaur is by far had the most appearances with Red.
Remember:
1- Origins contradicts the original games 90% of the time and it's not even consistent with Gen1 events.
2- Yellow is not canon, it's based on the anime only.
This making Bulbasaur is undeniable the canon starter.