Gotta Catch'em All
Classic Caster Calls
100

The only Pokémon to have a regional dex number of 0

Victini


100

This call in a game of Dota between Secret and Fnatic, which when translated to English goes "Walk steadily and Normal (attack)" 

"Lakad Matatag!" "Normalin. normalin"

200

Due to VGC rules, And Smeargle having access to Sketch, this Pokémon was never legal in VGC play with its signature move unnerfed

Darkrai


300

In 2006, this disgraced ex-WWE star was asked to commentate the VGC US Nationals

Hulk Hogan


400

This Alolan region is notable for the level of Pokémon you can encounter in it being different depending on whether you were playing Pokémon Sun or Moon

Mount Lanakila

(43-46 in Sun, 42-45 in Moon)

500

Version exclusives are often unobtainable outside of trading in mainline games, however, the Japanese versions of this generation had their exclusives switched.

Gen 2 

Teddiursa is Japanese Silver exclusive, International Gold exclusive.

Phanphy is Japanese Gold exclusive, International Silver exclusive.