Problems with pirate Famicom multicart

[AlexRUS]

Hi, everyone!
So, here's what's the problem that I have.

I got one of pirated multicarts for Famicom. It includes Magical Doropie, Yume Penguin Monogatari, Jackie Chan, Double Dragon 3.
The problem is that, in Magical Doropie and Double Dragon 3, some really annoying vertical lines appear on the screen, which doesn't look right at all. In other two games, such lines are not presented.

Here's my video, where I show it more detailed:
https://www.youtube.com/watch?v=ZSV2NvEgXtc

(I used Dendy Junior-2 Famiclone here. I have other Famiclones only at my countryhouse, and I go there only on weekends, so once I get there, I will test out this cartridge on other consoles, just to ensure that this problem is with cartridge itself, and not the Famiclone that I was using in the video)

The cartridge is not a glob-top. It's got proper EPROMs and capacitors on it.
http://i1332.photobucket.com/albums/w608/SomeRussianMarioDude1/Private/IMG_20141110_182347_zpsatfvdwyu.jpg
http://i1332.photobucket.com/albums/w608/SomeRussianMarioDude1/Private/IMG_20141110_182357_zps1lcfvvzv.jpg

Thanks in advance!

EDIT: Fixed the link to YouTube video!

[number47]

Have you tried cleaning the cartridge pins? On the backside they seem to be pretty "used".

[folffairport]

not to go off topic but in that first game you played in the video, you kicked a frog in the face and frankly thats awesome XD