20 Mind-Blowing Facts About The Minions
14. The Minions Get Their Teeth Fixed Between Films
In the first film, the Minions' teeth are crooked. In the second and the prequel, they are straight. Of course, there's a straightforward explanation: straight teeth are easier to animate overall than crooked teeth, especially when you have so many Minions to keep track of. The Minions are already largely limited in terms of hair types and body types.
But that explanation hardly satisfies one's inner child. Fortunately, it's easy enough to imagine fantasy explanations, such as Gru indulging his Minions' love of ba-na-na popsicles far too much, until his adopted daughters taught him better dental hygiene.
In any case, this issue seems to have inspired some unofficial mobile games: Minion at the Dentist and Minion Tooth Problems.