When the widescreen hack is enabled, it's applied globally, no matter what is running. As for why the IPL stretches with Super Mario Strikers but not Paper Mario TTYD, I'm not sure, but could be related to Paper Mario TTYD GameINI enforcing "Store EFB Copies to Texture Only", "Immediately Present XFB" and "Disable Bounding Box" options to disabled.
And by the way, Super Mario Strikers is currently listed on the wiki as a game with native widescreen support. Why exactly are you enabling Widescreen Hack on it?
And by the way, Super Mario Strikers is currently listed on the wiki as a game with native widescreen support. Why exactly are you enabling Widescreen Hack on it?
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 32 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)