Create a Poké Ball

[Drayton]

Name: Swipe Ball
Appearance: 2 Blue Stripes on both side
Effect: +80% Catch rate on a pokemon with just (1% HP)

 

[Mr. Meme]

Name: Negative Ball
Appearance: Totally black, with purple dots and a purple rim.
Effect: If the Pokemon has a scary/evil backstory, then the catch rate is increased.

Yeah, I got nothing.

 

[Kameken]

Name: Yin Yang Ball
Appearance: White with black dot on top, black with white dot on bottom
Effect: If the user's current pokemon is a fighting type, and the target a dark type, catch rate is x3. If the target is fighting as well, catch rate is x0.5. Vice versa.

 

[Drayton]

Name: Expert Ball
Appearance: Top with Green Star and bottom with orange stripe
Effect: x3 Catch rate if the player's pokemon is super effective against the wild pokemon's type, Catch Rate is x1 if just regular effectiveness and 0.2 if not/no effectiveness

 

[Majestic Electric]

Name: Dragon Ball

Appearance: It's a Pokéball completely orange in color and the top half of it has seven small, red stars on it. It looks like a regular Pokéball, except the top half is colored blue and has a picture of yellow dragon head on it.

Effect: Gives a x3 Catch rate when catching Dragon-type Pokémon. Gives a x0.5 Catch rate when using it to catch Pokémon of other types.

 

[EmTheGhost]

Name: Relief Ball
Appearance: Beige-ish (like the Level Ball) with a green check mark on it
Effect: Catch rate increases dramatically after all other balls in the bag have been thrown (excluding Master Balls).

 

[strangerhypno]

Name: Booster Ball
Appearance: Gold color with a blue star on it.
Effects: Gives the caught Pokemon permanent stat boost +10 to everything but can only be used on Pokemon with a BST less than 400

 

[icycatelf]

I'd like to see more Apricorn Balls made from colors not native to Johto (like purple and orange). Orange could be used for a Sun Ball (a Sun Stone version of the Moon Ball), but I've not got any ideas for the Purple Apricorn. Maybe even rare-colored Apricorns like Gold and Rainbow could exist and be turned into Poké Balls with really cool effects (like maxing-out a Pokémon's IVs or changing its color), but these would be incredibly hard to find (maybe a 1/4000 chance from any Apricorn Tree).

Here's an idea I had from the distant past:

Name: Egg Ball / Cradle Ball
Appearance: A ball made from the discarded shell of a hatched Pokémon. The opening is zigzagged.
Effect: The original idea was to explain hatched Pokémon magically getting their own Poké Balls (all hatched Pokémon would be in this Ball), but since many players enjoy the new-ish ability to pass-down Poké Balls via breeding, I figure it would be better to make it increase the catch rate of Baby Pokémon found in the wild instead.

 

[strangerhypno]

That maxing IV poke ball sounds so sweet, wish it was real. The Egg Ball thing sounds nice but wouldn't chucking an ultra ball be as effective?