Characters no longer gain MP from investing in INT and haven't done so since the RED update.
The only way to obtain more MP is to invest AP into the MP stat, invest hyper skill points into MP, or obtain MP-increasing potentials and flames on gear. However investing in MP isn't really all that useful versus simply investing in stat bonuses.
Under the hamburger menu at the top-right of the screen in Maple M, tap the gear icon at the bottom right, then tap "Account". You'll see the option to link accounts on the left-hand side of the menu.
Maplestory 2's global and Japanese services were shut down, reportedly because Nexon decided they would be unable to maintain the same level of service for longterm support.
A memory leak is when a computer program doesn't properly free up the memory it was using to run. Typically this results in the program crashing after it uses up all available computer memory and cannot run anymore.
In Maplestory, this is usually indicated by missing assets, overlapping assets, skills not hitting properly, and weird BGM issues, typically followed by the game crashing.
This is usually fixed by doing a restart or a full shutdown of your computer. In extreme cases, uninstalling and reinstalling might help as well.
