Normally, when the player is Link, the Tanooki Suit, Hammer Suit, Shell Suit, Penguin Suit and Frog Suit become pendants. Sysval(npcstyle) disables those power-ups from changing into pendants even when the player is Link. It also prevents coins from turning into rupees when playing as Link.
It's a read and write system variable in 1.4.5, but only write for 1.4.4. 0 is to enable the suits changing when the player is Link, 1 is to disable the suits changing when the player is Link.
https://m.youtube.com/watch?v=eGnoSWjKjNk
