Pokemon Roulette

You can access the Roulette by interacting to a guy wearing a black suit and he is usually found outside the PokéMart.

To spin the Roulette, you have to pay 6 Robux and you will get the Pokémon on which the Pointer stops. The Upgraded Roulette, which gives you a higher chance of a better Pokémon, costs 18 Robux.

You can get every Pokemon in the game (including shinies and auras) and the level of Pokemon depends on the Badges you've earned. Every Pokémon in the game can be obtained from the Roulette except for Rotom as it was removed from the Roulette at the beginning of February 2017. Since Rotom is now considered a lot more valuable than before.

Example: Having 7 GYM Badges makes all the Pokémon won from the Roulette to level 77.

There is a new type of roulette as of March 1.

Tiers
Each Pokémon from the Roulette has a 'tier' or 'rarity' that is indicated by the color in the background and chat text. Here are the tiers for the Pokémon Roulette:

Light Green = Common
Here are some common Pokémon in the chart below:

Green = Uncommon
Here are some uncommon Pokémon in the chart below:

Dark Blue = Even Rarer
Gyarados and Milotic are also a dark blue rarity. Lucario too.

Purple = Very Rare
All Pokemon with 600 base stats in total and can sometimes be a legendary or a Pseudo-Legendary

White = Ultimate
Very hard to get legendary Pokémon or a Pseudo-Legendary