To unlock and catch the Regi Trio you need the following:
🔴Relicanth location - Route 124 and Route 126 Underwater (Dive)
🔴Wailord location - Route 129 or evolve Wailmer at level 40
🔴Pokemon that knows the move Dig, Rocksmash & Flash
🔴Nincada and Trapinch are only Pokemon that can learn Dig
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