I don't like to title posts ambiguously, but this time we're diving into some big spoiler territory. If you don't mind having a moment in the latest Pokemon movie spoiled, continue reading on!
Pokémon: I Choose You! has a moment where Ash jumps in to block Pikachu from an attack, which ends up killing him. No worries, as he's brought back to life shortly thereafter. The real interesting moment comes from when Ash is in some sort of limbo after getting attacked. He tries to run towards Pikachu, but can't get there. As Ash is trapped in this limbo, Pikachu turns to Ash and tells him, “I want to be with you forever.”
Yep, Pikachu actually speaks to Ash with something other than his usual "Pika" rants. I'd say that qualifies as a pretty big moment, don't you think?!