Leon!! D:
I dicovered that since Gen I type weaknesses/strengths have expanded! For example, Gen I psychic was only weak to bug, Gen II onwards it's weak to bug, dark and ghost! Told you it got more complicated!
NYAH!
Well dark wasn't added until gen2 so of course that'd change the type effectiveness chart a bit. :x
Ghost I can understand being confusing though. Just like how it was confusing in gen1 to anyone that watched the cartoon because on there they mention psychic being weak to ghosts, but in the games they weren't.