Does every pokemon game has a trio of legends?

Question

I am not sure because of pokemon yellow, blue, red can you catch the three legendary trio? I know that in the other games you can.

Answer 1

I'm pretty sure Articuno, Zapdos, and Moltres were the Legendary Trio for Blue, Red, and Yellow.

Answer 2

yes

Y/B/R:3 birds

G/S/C:3 dogs

R/S/E:3 regis

D/P/P:3 spirit lake pokemon