Simba would be Dusk Lycanroc for sure xD
If you look at Simba and then Ash's Dusk Lycanroc and also account for their personalities (neither like their fur messed up from water), you'd swear these two dogs were twin brothers.
I mean I always thought of me and Simba's bond as a bit like Ash and Pikachu's (or Korrina and Lucario, more-so nowadays xD; ), he's been my only pet for nearly 12 years now, so its kinda natural to think this way, but the similarities between him and Ash's Dusky, both in looks AND in personality, can't really be ignored.
Well okay he doesn't get as aggressive as dusky over getting wet (cept a little, sometimes, when we try to bathe him. so we don't bathe him very often anymore *good thing he's a shiba inu and groom's himself xD;*), but still. They remind me of each other so much overall anyways xD
Also, Simba is a little like Lycan when he was a Rockruff, too. Ash's Rockruff was always so spirited and a bit bold. Honestly, very shiba inu like. xD;