Garteam
Smash Master
I don't know if I would agree with the idea of Mimikyu was "made to be popular". Mimikyu's reveal was kinda lowkey, being revealed in an issue of CoroCoro magazine. Compare this to other major players such as Decidueye and Lycanroc, who had international videos showing off their release.I feel like I've made this point several times but I'll mention it again because it's relevant. The Pokemon Company knows what they are doing. They already know which Pokemon will become the popular picks before they release them (besides surprises). Rowlett, Lycanroc, Mimikyu and to an extent Littens whole line were made to be popular, hence their huge promotion and role in the Anime. The Anime needs to be written and storyboarded in advance, it's not like they wait until the games are released to decide which Pokemon Ash will catch. It's all planned. This is marketing.
I'm kinda ticked about it too because I saw a video last night that said Mimikyu wouldn't be picked because popularity has never been the reason a Pokemon was picked for Smash. Mimikyu aside, are you kidding me? Melee - Mewtwo. Brawl - Lucario. Smash 4 - Greninja. Are you trying to tell me none of these Pokemon were the popular pics of those generations?
Just saying, just because the roster may have been decided before Sun and Moons release (not that that matters because they could have definitely seen which Pokemon were stirring the most hype for release) does not mean popularity will not play a role.
Additionally, I wouldn't really call Mimikyu's role in the anime as a sign its meant to be popular. Sure, it has a reoccuring role as Jessie's Pokemon this season, but others like Seviper and Woobat also have had this role and obviously didn't have it because Game Freak wanted them to be popular. Yes, Mimikyu is popular, but its popularity more comes from the fanbase latching on to it as an ensemble dark horse than a direct push by Game Freak itself.