Add Bellignan, fix evo stones

My first foray into adding Pokemon, here's Bellignan! Imported the sprite animation from Pokemon October. Works like a charm!

I also fixed the new evo stones, which didn't have their effects assigned yet.

data/pokemon/dex_entries/bellignan.asm

@@ -0,0 +1,10 @@
+	db "SPROUT@" ; species name
+	dw 403, 160 ; height, weight
+
+	db   "It lives through"
+	next "absorbing nutrients"
+	next "in the ground with"
+
+	page "its root-like"
+	next "feet. Revered"
+	next "by some faiths.@"