Yes, although the tiles in seafoam islands are from another tileset you can import it with the respective pallete to the tileset you're using in your map :)
Yo, you'll be needing an emulator to play GBA Hacks and LIPS (pretty sure you can find it in google) to patch your clean ROM's (I can't link you the ROM's as you can't do that here you'll have to find where to download those yourself.) so you can play your hacks. :) You can download your hacks here on the
Hacks Studio forum again you won't be directly downloading the game you'll have to patch on a clean ROM.
Instead of a block, blocking your path why not make it an event person? Much like how you get items from a pokeball and instead of giveitem just give the respective special for the running shoes and do a hidesprite and use a setflag to make the event complety hidden after executing.
You can find the codes for those commands here on my
scripting tutorial. :)
You would have to take note of the offset that you have for the @main pointer of whatever your scripts original pointer was and it should automatically repoint when you put the offset on A-map. :)
I'm rusty on scripting please don't kill me lol