What are all effects and damage when its a rainbow in the sky?

Question

There is a video showing some Combo Moves and in a Wild Double Battle, he uses a Empoleon using Water Pledge appearing the message ''Empoleon is waiting for Emboar's move...'' and then Emboar uses Fire Pledge and appears the following message ''The two moves are joined! It's a combined move!''
Then appears some ''Hot Water Jets'' (only hits 1 Pokemon) from the ground doing damage on the wild-pokemon and showed the following message ''A rainbow appeared in the sky on your teams side!''.

The question here is -
What's the Base Power the Attack was?
What are all effects during Rainbow? (For exemple in sandstorm, rock-type Pokemons's special defense is raised 50%).

The Video - HERE (Minute 3:50)

Answer 1

Water + Fire

• Inflicts damage at double the power (Comes out as Water Pledge)
• Creates rainbow for 4 turns
• Rainbow doubles the probability of secondary effects (does not stack with Serene Grace)

Water + Grass

• Inflicts damage at double the power (Comes out as Grass Pledge)
• Creates a swamp for 4 turns
• Swamp halves the speed of all Pokemon on the targeted side of the field

Grass + Fire

• Inflicts damage at double the power (Comes out as Fire Pledge)
• Creates a sea of fire on the side of the field of the target of the combined move for four turns
• Sea of fire damages all non-Fire-type Pokémon on that side of the field for 1/8 of their maximum HP at the end of each turn for four turns
• Above affect is negated in rain

Bulbapedia

Comments

What happens in a triple battle when all 3 moves are used at the same time?