Gold, Silver, and Crystal introduced several new mechanics to the Pokémon franchise in an attempt to perfect what the Generation I games had created. From a day/night cycle to friendship evolution mechanics, these games introduced many of today’s staples in the series.

One of the things these games introduced was the Apricorn system. These were acorn-like berries from trees around Johto that could be turned into Poké Balls by the ball maker, Kurt, who lived in Azalea Town. His technique would turn different colors of Apricorns into special Poké Balls with varying effects. Some of these balls were glitched and didn’t work as intended, but assuming they had, here are the best and worst Pokémon to use them on.

14 Black Apricorn - Best

Black Apricorns could be turned into Heavy Balls, which have different effectiveness based on the weight of the Pokémon you’re trying to catch. For best results, you’ll want to throw them toward Pokémon that are very heavy.

In Generation II, if a Pokémon weighed more than 903 lbs (about 409 kg), the ball would have a +40 modifier. As a result, a Pokémon like Snorlax (1014.1 lbs or 460 kg) would be super easy to catch with a Heavy Ball.

13 Black Apricorn - Worst

The Heavy Ball receives a catch modifier bonus for large, heavy Pokémon. But, the inverse is true as well — lighter Pokémon are harder to catch with this ball. Any ‘mon that weighs less than 225.5 lbs (102.3 kg) will receive a catch modifier of -20.

It’s best to avoid using this ball on light Pokémon, as it will perform worse than a regular Poké Ball.Gastly, the lightest Pokémon in existence, weighs a measly 0.2 lbs (0.1 kg), meaning it’ll receive a terrible catch modifier.

12 Blue Apricorn - Best

If you give Kurt a blue Apricorn, he can turn it into a Lure Ball for you. This ball will have a better catch rate for Pokémon you encountered while using a fishing rod, which are mostly Water-types.

Pokémon like Magikarp, Chinchou, and Krabby are all good candidates for this ball. However, one could argue the best candidate is Tentacool, as it is encountered while fishing and the colors of the ball match Tentacool’s color scheme perfectly.

11 Blue Apricorn - Worst

It may be obvious to most people, but using a Lure Ball on a Pokémon you didn’t encounter using a fishing rod is not a smart idea. Basically, anything that is caught far from water should be caught with another type of ball.

If you’re one of the people who likes to match the ball to the Pokémon, Fire-types might be the worst choice for this one.

10 Green Apricorn - Best

Green Apricorns that are brought to Kurt can be converted into Friend Balls. These green balls will make a Pokémon more friendly toward you, bumping the base friendship upon catch to 200. You’ll want to use these on Pokémon that evolve when they are at a high friendship level with you.

There are only a few Pokémon in Generation II that this applies to: Zubat, Chansey, Eevee, and the baby Pokémon. Zubat and Chansey are the only ones here that can be caught in the wild, so you’ll want to use the ball on them. Zubat’s typing matches the color of the ball, so it’s the better choice here.

9 Green Apricorn - Worst

There are very few instances where you’ll want to prevent friendship from increasing in Pokémon. This means the Friend Ball will almost always be a fine choice for catching something.

The only case in Generation II where this might matter is if you plan to teach Frustration to a Pokémon. This move is more powerful the less friendly the user is, so a high friendship level would make it worse.

8 Pink Apricorn - Best

This is another situation where there’s a glitch. Pink Apricorns are turned into Love Balls, which are supposed to have a higher catch rate on Pokémon that are the opposite gender of yours.

However, they were accidentally programmed to only increase catch rate for Pokémon the same species and gender as yours. But, if they had worked, wouldn’t Snubbull just match this heart-adorned ball perfectly?

7 Pink Apricorn - Worst

In reality, using this ball on any Pokémon that isn’t the same species and gender as yours will be a bad idea, thanks to the glitch. But when operating under the assumption that this ball would work as intended, you’d want to avoid wasting it on anything that is the same gender or genderless.

A Pokémon like Magnemite, which is always genderless, would be a complete waste. It’ll never be the same or opposite gender of your Pokémon.

6 Red Apricorn - Best

If a player brings Kurt a red Apricorn, he can turn it into a Level Ball. This ball is more effective the lower the level of the wild Pokémon compared to your Pokémon’s level.

If you were to use this ball on something that is always a low-level in the wild, like Weedle, it would work very well. Weedle is also a good choice because the ball’s red, yellow, and black color scheme matches Beedrill very well.

5 Red Apricorn - Worst

On the flipside, using this ball on a Pokémon that is a high level will be a complete waste. If the Pokémon you’re trying to catch is a higher level than your own, it’ll function like a regular Poké Ball.

Legendary Pokémon are level-locked, as there is only one of each. Avoid using this ball, as there’s a low chance you’re a significantly higher level than the legendary.

4 White Apricorn - Best

Here we have another glitched ball. White Apricorns are turned into the Fast Ball, which should theoretically work better on Pokémon that are fast or likely to flee, like Cubone or Teddiursa, which have a 50% chance to flee during each turn.

In reality though, this glitched ball is only effective on Tangela, Grimer, and Magnemite, which only have a 10% chance to run.

3 White Apricorn - Worst

Since the Fast Ball is glitched, it would be unwise to use on a Pokémon that has a high flee rate, since it will not work and trap them. You’ll want to use an Ultra Ball or something stronger on those Pokémon, otherwise it’s likely you’ll lose them.

In later generations, this ball was changed to have a better chance against Pokémon with a high speed stat. As a result, it would be unwise to use it on one of the slowest Pokémon: Shuckle, who has a speed stat of only 5.

2 Yellow Apricorn - Best

The last Apricorn ball on this list is also another glitched one. If Kurt gets his hands on a yellow Apricorn, he can turn it into a Moon Ball, which is supposed to have a higher catch rate for Pokémon that evolve with a Moon Stone.

This means your best bets are things like Clefairy and Jigglypuff. In actuality, the glitch with this ball makes it more likely to catch Pokémon that evolve when exposed to Burn Heal, of which there are, of course, none.

1 Yellow Apricorn - Worst

The Moon Ball will function as a regular Poké Ball in all cases, due to its glitch. But, if you’re operating under the assumption that it works as intended, it might be a good idea for those Pokémon above.

But, for the worst choices, it would be strange to catch any diurnal or daylight-related Pokémon, like Sunkern and Sunflora. This is simply because the ball wouldn’t match or make any type of aesthetic sense.

NEXT: Pokémon: Every Pokémon That Can Learn Petal Dance By Leveling Up