Evolving Magikarp into Gyarados
Possibly the most famous evolution methods in Pokemon Snap, evolving Magikarp into Gyarados was a multi-step process that required precise timing.
On the Valley course, Magikarp would jump out of the water randomly. You could knock one out of the water and onto the land by timing a Pester Ball throw perfectly.
Here’s where some of the precision came in: you had to knock one close enough to a Mankey in the beginning of the course, close enough so it would be in range of the Mankey to kick it. This would send the Magikarp flying so far away that you wouldn’t see it until later in the course.
Once you approached the waterfall in the valley, you’d see the Magikarp flopping on the land across from it. Hitting it with another well-timed Pester Ball would knock it across the river and into the waterfall.
This revealed a giant Gyarados sticking its head out of the waterfall, and you had a quick chance to snap a good photo of it.