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Using the 'remaining HP glitch' to get x 'rゥ.4- (hex: FD) without w sm (Pokémon Yellow)

2,736 views · Published 29 April 2014 · 6:05 · Indexed 25 October 2026

Channel: Evie (ChickasaurusGL) 🌺 · 2014 · Gaming

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This amazing glitch was documented by Paco81 in June 2011, see this thread: http://profglitch.proboards.com/thread/368/another-mew-trick

This is the first time I've played around with it; since I was not fond of the Q Glitch before I tried it and found it relatively simple, and I haven't actually looked into the remaining HP glitch other than the surface of it yet, but it has been used to make a Pokémon have any attribute you want if it's possible to have a later byte with that data, by shifting Pokémon data back. This has included getting flawless Pokémon, but to do that requires abuse of the PP Underflow glitch to get what is defined as 63 PP and 3 PP Ups used, as PP follows DVs.

In its most basic form, the attributes about your first boxed Pokémon, which later becomes the second are shifted backwards, such that your remaining HP byte; in party: D16C in Yellow, D16B in Red/Blue becomes the Pokémon's recipient byte, D16A; this means when you deposit the Pokémon into the DayCare and receive it it will change species to what was in D16A, e.g. a current HP of 21 becomes 21; hex:15 in D16A which is Mew.

The steps for the simplest form of this glitch are like this:

0) : Requirements:

Have an empty box 1 that has '''never''' had 20 Pokémon. This is important! On real hardware DA94, the end marker for a box will always be FF in box 1 if you've had 20 Pokémon, but it will be 00 if you've never had more than 19 Pokémon there. I assume this matters because of the game 'getting' the FF before it takes the FF in your Pokémon's remaining HP, which is located later in memory at DA98 and starts to bring bytes upwards, because I've seen something like this with the ZZAZZ glitch's 'missing party terminator' sub-glitch.

That ZZAZZ glitch 'missing party terminator' sub-glitch allows you to corrupt your items, if there is no FF between party data and item data, up to the item's list Cancel, but I digress.

If the box is not empty but you have had Pokémon in it before the glitch may work differently, apparently you'd need to deposit more Pokémon or something. I haven't tried this yet and read into it properly. I find it difficult to understand things without trying them, sorry.

You cannot use boxes 2-10; well if it does work it's an emulation error, as the box you deposit your Pokémon with the chosen remaining HP because a lot of data for those boxes become FF, including DA94, but when you switch from another box back to box 1, DA94 will be 00 again if you never had a 20th Pokémon there.

Another thing you need is a box other than box 1 with like 5 or more Pokémon in it for you to withdraw to get a full party.

1) Have six Pokémon in the party, including a Pokémon with a catch rate of 255 as the first Pokémon and the remaining HP of your choice, four other Pokémon and a Q, index number: FF which can be obtained by evolving 4 4Hy, C0, Ditto glitch special: 192 at level 6. I haven't looked into this more, so it may help to use the species in this video, or at least the ones that have the 255 catch rates.

2) Deposit the Pokémon in box 1 in order, so the catch rate 255, chosen remaining HP Pokémon comes first, except when you get to the fifth one, where you deposit Q last. Remember you can't deposit your last Pokémon, which is why we need 6.

Example box order:

Caterpie
Rattata
Sandshrew
Pikachu
Q

3) Change to another box and get a full party. Then change back to box 1.

4) Capture a Pokémon; not sure if it has to have a catch rate of 255 but it would be a good idea and this will send it to the first position of box 1.

Example box order:

Spearow
Caterpie
Rattata
Sandshrew
Pikachu
Q

5) Change to the other box, and deposit all Pokémon but the first. Then change back to box 1.

6) Withdraw your Q. You'll notice your first Pokémon's level change if done correctly, but there's still room for mistakes.

7) Do these withdrawals in order:

Withdraw Poké #1
Withdraw what is now Poké #4 example: Pikachu
Withdraw what is now Poké #3 example: Sandshrew
Withdraw Poké #1 example: Caterpie

Deposit Q, heal your Pokémon, then go to the Daycare, deposit and receive your affected Pokémon to get your reward. :) But make sure you have enough money, I didn't so I had to cheat that in. :P

Since Pidgey's remaining HP in this video was  253 or FD, we get the FD Pokémon that may not be obtainable with Johto guard glitch due to the Pokémon you get for 251-255 not being consistent. FE is obtainable through evolution of an non-arbitrary code execution Pokémon, so that's why I chose FD.

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