Can you catch all three legendary dogs in leaf green version?

I've done research on this question myself and the answer is YES! After you beat the Elite Four you will be able to find the legendary dogs randomly in the grass (just like in Gold and Silver). However, for your game you will only be able to catch one of the dogs, which dog it is depends on your starter pokemon. The determiners are as follows:

Starters-Legendary Dog:

Bulbasaur-Entei

Charmander-Suicune

Squirtle-Raikou

Good luck to you!