How I can use IR for Games like Pokémon B2

U need to own the real ds games to use the IR

 

Then what does "ROM-sided" mean?

 

That means he's trying to use a Rom and not retail cart

 

no cant do mister, roms cant use IR. y̶o̶u̶ ̶c̶a̶n̶ ̶t̶r̶y̶ ̶p̶u̶t̶t̶i̶n̶g̶ ̶i̶t̶ ̶i̶n̶t̶o̶ ̶a̶n̶ ̶R̶4̶ oops, the R4 doesnt have IR

 

The infrared actually comes from the cartridge, the IR-module is intergrated into the actual Pokémon games. Use anything else instead of the official Pokémon-cartridge (like a flashcart) and you immediately lose any IR.

 

looks like you did the explaining for me, thanks!

as @Quincy was saying, yes, the IR is in the cartridge itself, try opening it up, and you'll see the IR module used

 

And the shell is IR transparent

 

Yeah but that is only really noticable if you have the cart open or are shining a flashlight onto it

The cartridges usually look more black instead of nds-grey

 

I can't remember where I read this, but you should be able to use the IR function of any DS game cartridge through TWiLightMenu running a rom; so if the game you're looking for is hard to find, maybe you can find another DS game that offers IR and use that cartridge instead. There were probably not many, but it's always better to have options.

I have tested this with the cartridge of Pokemon Heartgold in the cartridge slot of the N3DS, and I used TWiLightMenu to play Soulsilver : I was able to use IR to interact with the Pokewalker.