Catch Entei, Raikou, Suicune
Entei: Battle Dakim when Mt. Battle was being taken over. At Level 40.
Suicune: Battle Venus at The Under. At Level 40.
Raikou: Battle Ein at the Shadow Pokemon Lab. At Level 40.
All of these can be fought in a rematch with their respective trainers at the underground colosseum at The Under. They will still be Level 40.
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