Double save data size

[B13rg]

Doubling the save data size will allow the game to save more data. This allows for more pokemon boxes, more held items, and more space for saving other things.

The save data is 32KB in total, and two copies of it are saved. On an MBC3 type cart, this takes up the entire RAM. This change would require the game be converted to an MBC5 type cart beforehand, to allow for more RAM space. (Issue #106 ).

Once converted to MBC5, the game will have 128K of space instead of 64K. The save file will be able to be 64K instead of 32K.

• Boxes could have 30 pokemon instead of 20
• Increase number of boxes total from 14 to 20?
• Maximum held items could be 100 instead of 20
• Maximum PC item list could be 100 instead of 50

https://bulbapedia.bulbagarden.net/wiki/Save_data_structure_in_Generation_II

https://gbdev.gg8.se/wiki/articles/Memory_Bank_Controllers#MBC5_.28max_8MByte_ROM_and.2For_128KByte_RAM.29

[B13rg]

Using the Tpp1 MBC, we can get the space we need: #109 https://rgbds.gbdev.io/docs/master/rgbfix.1/#TPP1