What if Seasons 2, 3, and 4 of The Backyardigans Were Dubbed in Japanese?

Only the first season of '''Singx3♪ぼくら、バックヤーディガンズ! '''has been made. Why not the rest of the seasons?

Season 2 Title Changes

 * 1) Mission to Mars - 火星に行こう！ (Kasei ni ikou!)
 * 2) Samurai Pie - サムライパイ (Samuraipai)
 * 3) Scared of You - 怖がりオースティンの使命 (Kowagari Ōsutin no shimei)
 * 4) Whodunit - パブロ・ザ・ディテクティブ (Paburo za ditekutibu)
 * 5) The Legend of The Volcano Sisters - 最高の贈り物は何ですか？ (Saikō no okurimono wa nanidesu ka?)
 * 6) The Secret of Snow - 雪の秘密 (Yuki no himitsu)
 * 7) The Swamp Creature - ザ・トータリー・オーサム・スワンプ・アドベンチャー (Za tōtarī ōsamu suwanpu adobenchā)
 * 8) Horsing Around - 私は最高の乗馬者です！ (Watashi wa saikō no jōba-shadesu!)
 * 9) Special Delivery - スペシャル・デリバリー！ (Supesharu deribarī!)
 * 10) International Super Spy: Part 1 - ザ・クーレスト・スパイ (Za kūresuto supai)
 * 11) International Super Spy: Part 2 - ザ・クーレスト・スパイ・リターンズ (Za kūresuto supai ritānzu)
 * 12) Movers of Arabia -
 * 13) Cops and Robots
 * 14) Sinbad Sails Alone -
 * 15) Best Clowns in Town -
 * 16) Save the Day -
 * 17) Into the Deep -
 * 18) News Flash -
 * 19) Catch That Butterfly -
 * 20) A Giant Problem -

Season 3 Title Changes

 * 1) Who Goes There? -
 * 2) Blazing Paddles -
 * 3) Garbage Trek -
 * 4) Fly Girl -
 * 5) What's Bugging You? -
 * 6) Chichen-Itza Pizza -
 * 7) To the Center of the Earth -
 * 8) Front Page News -
 * 9) Tale of the Mighty Knights: Part 1 -
 * 10) Tale of the Mighty Knights: Part 2 -
 * 11) Le Master of Disguise -
 * 12) Match on Mt. Olympus -
 * 13) The Great Dolphin Race -
 * 14) Caveman's Best Friend -
 * 15) Ranch Hands from Outer Space -
 * 16) Robin Hood the Clean -
 * 17) Escape from Fairytale Village -
 * 18) Pirate Camp -
 * 19) The Two Musketeers -
 * 20) The Masked Retriever -

Season 4 Title Changes

 * 1) Robot Rampage: Part 1 -
 * 2) Robot Rampage: Part 2 -
 * 3) Catch That Train! -
 * 4) Attack of the 50 Foot Worman -
 * 5) Dragon Express -
 * 6) Flower Power -
 * 7) The Funnyman Boogeyman -
 * 8) Follow The Feather -
 * 9) Break Out! -
 * 10) The Action Elves Save Christmas Eve -
 * 11) Los Galacticos -
 * 12) For The Loves of Socks! -
 * 13) The Flipper! -
 * 14) Elephant on the Run -
 * 15) The Magic Skateboard -
 * 16) Pablor and The Acorns -
 * 17) Super Team Awesome! -
 * 18) The Big Dipper Diner -
 * 19) The Amazing Splashinis -
 * 20) The Tale of the Not-So-Nice Dragon -