Gen I: Fix Challenge Cup DVs (#3059)
Gen I: Fix Challenge Cup DVs (#3059)

SpA and SpD use the same DV, and HP DV is calculated using the 4 other DVs.
In-game, the DV range is [0;15], each point giving 2 points in the stats, so to simulate that we make every DV a multiple of 2 in the [0;30] range.
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