Pretty much, you only want to live in Japan this week.
North America - Elements of Destruction - Indianapolis 500 Legends - Luxor 2 - MX vs. ATV: Untamed - Warhammer 40,000: Squad Command
Europe - nothing (second week in a row, I think)
Japan - Dokodemo Pilates - Dorabase: Dramatic Stadium - DS Puzzler: Numpla Fan & Oekaki Logic Wi-Fi Taiou - Final Fantasy IV - Heisei Kyouikuiinkai DS: Zengoku Touitsu Moshi Special - Itsumono Shokuzai de Shuttai Chauseuteki na Sweets to Goshisou - Kousoku Card Battle: Card Hero - Lewis to Mirai Dorobou - Ochainu no Daibouken - Ojaru-Maru DS: Ojaru to Okeiko Aiueo - Pinky Street Kira Kira * Music Night - Simple DS Series Vol. 26: The Quiz 30000-Mon - Simple DS Series Vol. 29: The Sports Daishuugou - Yakyuu-Tennis-Volleyball-Futsal-Golf - Simple DS Series Vol. 30: The Table Game - Spongebob to Nakamatachi: Toybot no Kougeki - Sunrise Anime Duke - Sunrise no Joushiki: Minna no Hijoushiki - SuperLite 2500 Crimson Room - SuperLite 2500 Custom Mahjong - SuperLite 2500 Gekikara Numpla 2500-Mon - Survival Kids: Chiisana Shima to Ookina Himitsu!? - Tennis no Ojousama: Driving Smash! Side Genius - Waku Waku DS 1 Nensei
Tetris DS went out of print and went for stupidly high prices for a while. But I thought they made a new batch not all that long ago and fixed that. At any rate, if you want Tetris DS I bet I can find one for you locally at a normal-game price.