Early Gen Jank
Egg Groups and You
Dex Detectives
Move Translator
Competitive Edge
100

In Generation 1 this stat gives an increased chance for critical hit

Speed

100

Cacturne and Hitmonchan

Humanlike

100

The reason it hasn't changed in a hundred million years is that it's apparently already a perfect lifeform

Relicanth

100

Speed Star

Swift

100

What Starter has the most world champion wins?

Inciniroar

200

This Generation 2 final stage pokemon had it's name cut by a single letter due to system constraints

Feraligatr

200

Druddigon and Loudred

Monster

200

The light it emits is so bright that it can illuminate the seas surface from a depth of over 3 miles

Lanturn

200

Suprise attack

Sucker Punch

200

What generation was prankster nerfed to not work on dark types

Gen 7

300

Due to a bug this move in the first generation divided crit chance rather than multipying it

Focus energy

300

Reuniclus and Sinischa

Amorphous

300

It feeds on soil. After it has eaten a large mountain it will fall asleep so it can grow.

Larvitar

300

Shadow Clone

Double team
300

What generation was Weather setting abilities nerfed to not be infinite anymore?

Gen 6

400

In gen 1 this high power normal move would not have a downside if it knocked out an opposing pokemon

Hyper Beam

400

Skitty and Wailord

Field

400

For some reason it likes to land on peoples heads and acts like a hat

Swablu

400

Eerie Light

Confuse ray

400

This rock type move can warp entire metas but only in singles

Stealth rocks

500

Due to a bug in generation 2 these three statuses do not give any bonuses to catch rate

Poison, Burn and Paralysis

500

Cofagrigus and Snorunt

Mineral

500

They fly around at high speed striking with their pointed spears. Even when in trouble they face opponents bravely.

Excavilier

500

Wag finger 

Metronome

500

This normally weak pokemon single handedly got several moves nerfed. Most notably Dark void

Smergle