The Pooyan is NTSC The Strategy X, is PAL Konami titles were distributed by Gakken overseas.
PAL games don't do well in the US as we can't play them here. They all roll on my tvs.
I do have a few PAL games, like Atari BMX Airmaster CIB until I can locate a NTSC cart..
& PAL Mangia' CIB as I'm still unsure an NTSC exists. Only like 2-3 people claim to have these I think in NTSC, and only one box with an N sticker or NTSC sticker of some sort. I assume my PAL box would be identical to the NTSC if it shows up & is scanned.
I have PAL Action Force CIB, it's the foreign GI JOE, so I can play my GI JOE if need be, I leave this one sealed for show..
I've picked up a few more PAL games CIB for the boxes, then put the NTSC carts inside.
But mainly the only games of interest to me in PAL, as a 2600 collector would be the higher rarity exclusives, the Technovision games, Video Gems, the ITT games, I want original looking games, complete in boxes, and in good shape.

And not so much the pirates. Especially not fond of the crappy boxes without a title on spine. Like Zellers titles, these are junk to look at on shelf.