Pokemon Green

Normally when under the effects of Toxic ("Bad Poisoning"), your Pokemon takes incrementing amounts of damage: 1/16, 1/8, 3/16, and so on, of their max HP. You can negate this by switching out; when the Pokemon returns, it will only be taking a flat 1/8 damage like regular Poisoning.

Leech Seed is a move well-known for absorbing 1/16 of the target's HP and healing the user of the move by the same amount. However, you can actually boost this damage through the unintended effects of Toxic. When you use Toxic to Badly Poison a foe, and then use Leech Seed on them, Leech Seed's damage will also increment: thus, you regain 1/16, then 1/8, then 3/16, then 1/4, and so on, of your HP. Toxic will also be taking effect in this time, dealing the same amount of damage. In other words, you not only regain tons of HP, but also double the damage of Toxic, from one point of view.

To get onto the Cycling Road without needing a Bicycle, simply hold Left while the guard warns you that you must have the Bicycle to enter Cycling Road. (If you already obtained the Bicycle, this still works if the Bicycle is in the PC.) In doing so, you will bypass the guard; if you continue onto Cycling Road, you'll still ride a bike.

1. Go to route 1. Put the pokémon you want to turn into mew on the first spot in your team.2. Go to your item bag. Go to the thirdteenth item. Press select, b, b. Go into battle and select pokémon and press a on your first pokémon. Escape the battle.3. Return to either Pallet Town or Viridian City.4. Go back to route 1 and repeat step 2.5. Go to the daycare centre. Give him the pokémon in the first spot and take the pokémon back. Your pokémon just became a mew! It still has the name of the pokémon it initially was so I'd like to go to Lavender Town where the name rater can change the name of your pokémon into mew.

In the Japanese releases of Pokemon Red, Blue, Green, and Yellow, as well as all versions of Pokemon Gold, Silver, and Crystal, there is a glitch involving Substitute - no matter the accuracy of the move, if it is a move that absorbs HP (e.g. Absorb, Giga Drain, Mega Drain), the move will have a 100% chance to miss!

You need a link cable, 2 pokemon games, and 2 gameboys for this trick. On 1 gameboy, have a strong pokemon that you both want. On the other, have a weak pokemon that your willing to give up for the other one. Enter Trade mode and trade pokemon. On gameboy 1 (the one with the good pokemon), turn off the gameboy right before it says ''Trade Complete!''. The 2nd GB should say ''Trade Complete!'' on it. If done correctly, the bad pokemon on GB 2 should be deleted and replaced with the good pokemon. The good pokemon on GB 1 should still be there.

Once you've obtained the HM Cut you can use it to teach some of your pokemon the attack of the same name.
This ability now cannot only be used to cut down certain trees but also to get rid of any grass so you don't have to bother with any random encounters.
When saving and loading or leaving and reentering the area you used cut in, the grass will have returned.

This glitch can be executed on Pokemon who have used Hyper Beam and are Frozen during their recharging turn. If you use Haze on this Pokemon, they will thaw out - however, they will always be recharging from their Hyper Beam, meaning they and their Trainer can do nothing until you defeat it. You can capitalize on this with healing across the party, massive stat boosts, and inevitably killing the Pokemon.

This trick is very simple. Find a patch of grass in there. Stand in it and just tap the directional pad lightly just so you would turn without walking. You should encounter a pokemon and catch it if you would like.

In the Celadon Hotel, you will notice that the graphics and internal structure of the building are much the same as that of a Pokemon Center. There is even a PC here, although it is invisible: it is in the same spot as a normal Pokemon Center along the east wall. The same is also true of some of the Rest Houses in the Safari Zone that have Pokemon Center-like design. You can interact with this PC as normal to insert and withdraw your Pokemon.

However, take note that if saving is done your actual location will not be saved. This can be used to some degree for sequence-breaking glitches and speed-running by saving in one area by changing PC boxes, then reloading the file. You'll have all your progress done as before, but your location will be the same the file before this save. For example, you can save normally in Pallet Town, then do so in the Celadon Hotel by using its invisible PC. When you reload, you'll have met all of the progress you did between Pallet Town and the Celadon Hotel but will be back in Pallet Town.