If you have a Pokemon who knows any 1 hit ko moves and lock on use it

First:use lock on,on your opponent
Second:use horn drill etc make sure they don't switch out or use a move to escape it if they don't do this you kill there poke it's a good strategy to use when facing a tough opponent.

For those of you who are having serious trouble with Little Cup, Poke Cup and/or Pime Cup, Listen up. If you have G/S/C and you have a Gameshark or Action Replay, the cups will be easy. Just check out the Gameshark codes for this game on this site for all the codes because I'm not going to post them here, I'm just going to suggest a strong team with unbeatable moves.
For the Little Cup:
All you need is a Scyther, an Abra and a Cubone. Using the cheat cartridge make Scyther and Abra know these moves: Drill Peck, Belly Drum, Spore, Recover.
Make cubone know these moves: Earthquake, Drill Peck, Ancient Power, Karate Chop. And make it hold Thick Club. (You shouldn't need to use Abra and Cubone. Just give Scyther Sharp Beak and use it to win Little Cup. It's the easiest cup with these Pokemon with these moves. Don't forget to max out their stats. Especially their speed.)
For Poke Cup:
Catch an Electrode, a Crobat and an Aerodactyl because these are the three fastest Pokemon. Just make them know Drill Peck, Belly Drum, Spore, Recover.
For Prime Cup:
Again use Electrode, Crobat and Aerodactyl but add a Mewtwo because that is also fast and just give them the same moves. (Drill Peck, Belly Drum. Spore Revover.) Don't forget to max out their stats.
You may be wondering, "Why Drill Peck?". Well, Belly Drum increases a Pokemon's physical attack power. Drill Peck is a flying type attack which is physical. It is powerful and it's accuracy is 100 and flying type attacks affect every type of Pokemon. Ie Normal and Fighting don't affect Ghost etc.

The power of Seismic Toss, Night Shade and Psywave is not displayed and so it may put doubt in your mind as to whether or not to use these moves in battle. Well this should help. Seismic Toss and Night Shade always inflict a set amount of damage. This damage is equal to your Pokemon's level.

So if your Pokemon is level 100, the damage your opponent recieves will be 100, despite attack and/or defence changes during that battle. If your Pokemon is level 53, the damage your opponent recieves will be 53. The same goes for level 5, if you were to use one of these moves in the Little Cup. Psywave is different.

It alternates between a small amount of damage and a large amount of damage. Small damage is roughly between 30-35 and large damage is roughly between 130-135. However, the downside to Psywave is it's accuracy, which is 80 wheras Seismic Toss and Night Shade have an accuracy rating of 100.

Earn all 3 medals in Earl's Academy to unlock the opportunity to view which versions some Pokemon appear in with Pokemon G/S/C included to the games list. You will also be able to view some other information about G/S/C Pokemon.

If you want a Purple Ditto, then do this:

First, catch ditto on RED or BLUE.
Then, name it JELLO and now when battle it or check it the pc it will be purple.

Enjoy

when you have selected your team of 6 just register them to ensure that you can use them in cup matches without having to choose them over and over again.

Here's a good team for facing the Elite Four:



Lugia. Make sure Lugia knows the following moves:Aeroblast, psycic, blizzard and recover.



Ho-oh. Make sure Ho-oh knows the following moves: Fireblast, psycic, Earthquake, and recover.



Steelix. Make sure Steelix knows these moves: Wrap, Sandstorm, Irontail, and protect.



Mewtwo. Make sure Mewtwo knows these moves: Psycic, Thunder, Blizzard, and recover



Articuno. Make sure Articuno knows these moves: Ice beam, SkyAttack, hyperbeam and blizzard.



For the last poke'mon select any strong fighting poke'mon, that knows at least one strong fighting attack.



A tip to beat Koga: First send out steelix. Then use sandstorm right away.



Koga's double team attack will not effect sandstorm in away; it will always hit.



The keep using protect and wait for your your enemies to get Knocked out! (remember to use sandstorm whe it subsides)

If you want to win the mini games then use your own Pokemon with an adaptor!