It doesn’t have to be one specific Pokemon.
Pleaselog inorregisterto add a comment.
It is Audino found in
Route 1, 2, 3, 5, 6, 7, 9, 11, 12, 13, 14, 15, 16, 18, Dreamyard, Dragonspiral Tower, Abundant Shrine, Giant Chasm, Castelia City, Lostlorn Forest, P2 Laboratory, Victory Road, Village Bridge, Pinwheel Forest, Virbank Complex, Floccesy Ranch, Nature Sanctuary, Reversal Mountain, 20, 22, 23
almost every route
that is AUDINO. Yes I know it sounds wierd but shaking grass is on every route and still you can catch them at every level from level 18 to 63. They are also the best training Pokemon available that I know since they give you a bunch of exp and in the anime are used by nurse joy.
Source: I dont need a source since kids that you talk to on the game explain it and 85 percent of shaking grass is an audino.