The retyped Pokemon will be a special breed exclusive to Kalos --- Jack, where huv ye been Jack? I've been dead since last Thursday, you killed me!!! Where's mah broon loaf!?!?!?!?!!? - Victor, Still Game
They discover that subtle DNA differences in some Normal types have just now been fully documented and the kids are just now informed on it from the regional professor as a new discovery in the field.
What will happen:
Herp derp it's always been like this and the main cast just forgot derp a de derp derp.
As for explaining that situation with Jiggs, you expect consistency? They had Shadowball effect normal types before. --- Currently playing: Pokemon Black 2 Perfect Run(JPN) 649/649 owned, 3 Star Card, Rayman Orgins(Wii)