I find and buy rare Famicom and Sega Mega Drive/Genesis cartridges with bootleg games. Here's what I have:
VT-065: 3-in-1 (GameCard). Acquired in 2017. Contains Kart Fighter.
YH-8025: 4-in-1 (GameCard). Acquired in 2018. Contains Lu Ye Xian Zong.
FX-025: 25-in-1 for Mega Drive. Acquired in 2020-2021. Contains Fixiki (Russian hack of Squirrel King).
SPC010: 5-in-1 (TV. GAME). Acquired in September 2024. Contains an original version of Super Lion King, and also Earthworm Jim 2 by Super Game.
The Lion King 5 (TSC DANDYK). Acquired in November 2024.
K6022: 6-in-1. Acquired in December 2024. Contains "Lion King 7" (rare undumped hack of Lion King 5).
Танки: Новая Битва for Mega Drive. Acquired in March 2025.
Tom and Jerry 3 (one of two original cartridges). Acquired in October 2025.