Self-explanatory.
Here's my first one!
Phantom ball.
A ball that works well on ghost type pokemon.
I like that idea ;D
Why don't you design a pokeball then? ;)
Yeah i might do that ;D
Mud Ball
Works best on ground types.
Mind Ball
Works best on psychic types
Boulder Ball
Works best on rock types
Dragon Ball
Works best on dragon types
Thief Ball
Has the catch rate of a Great Ball. Even if it fails, it steals the wild Pokemon's held item, which is sent to the bag
Revival Ball
Allows the user to take a chance to capture a fainted Pokemon. Costs a ridiculous amount of money to combat how useful it can be.
Jack-In-The-Ball
When this Pokeball makes contact, a jack-in-the-box pops out and deals damage to the wild Pokemon before pulling it into the ball. Like a Timer Ball, the catch rate increases with the passing of turns.
Cherish Ball
A special PokeBall for catching Mythical Pokemon.
Legend Ball
A special PokeBall for catching Legendary Pokemon.
Dark Ball
Turns your Pokemon into a shadow Pokemon when you capture it.
Unlevel Ball
Decreases the caught Pokemon to Level 1.
Light Ball
A somewhat different ball that works better during daytime or in bright places.
Random Ball
A somewhat different Ball that randomly chooses the effect of any other PokeBall and becomes that PokeBall if the catch is successful.
Speed Ball
A somewhat different PokeBall that guarantees capture on a roaming Pokemon.
Reverse Ball
A strange ball that works better when the target's HP is high.
Sparkle Ball
Copies the Pokemon's color scheme when it catches the Pokemon.
Distortion Ball
Found only once in the Distortion World (DPP, BDSP), and many times in Space-Time Warps (Legends: Arceus)
Works well on Pokemon found in the Distortion World and the Space-Time Warps (10x catch rate multiplier), but not as well on other pokemon (0.1x catch rate multiplier).
Design is similar to the Moon Ball in color, but with a purple/dark red on the bottom half.