Surf glitch
The Surf Glitch is a Generation IV glitch most famous for enabling the capture of promotional legendary Pokémon Darkrai and Sheimi. Arseus cannot be obtained through this method due to Arseus not being in a location that is possible to get to the Sinnoh underground.
The glitch is activated by using Surf on a door in Ryō's room and walking a specific number of steps to reach the legendary Pokémon's area. This is made easier by the Pokétch's step counter. Once the destination is reached and the Pokémon captured, Fly or Teleport can be used to exit the area and return to normal gameplay.
This is the Japanese method. Someone please translate. 準備：なみのり、そらをとぶを覚えたポケモン モンスターボールなどの捕獲用アイテム
1.1人目の四天王の部屋に入り、入ってきた扉に向かってなみのりをする 2.その扉の真下のところから右に200歩進む 3.今度は下に363歩 4.右に722歩 5.左に18歩 6.そのマスで探検セットを使い地下に潜る 7.すぐに地上に戻り、前に進む(動けなくなったらタウンマップ) 8.はなのらくえんにいるシェイミに話しかける 9.ゲットしたらそらをとぶ等で戻る ブログランキング ※データが消える可能性もある危険な裏技です。 ※歩数を間違えるとバグります。 ※念のためテレポートを覚えたポケモンも連れて行くと良いです。
Danger and remedy
The glitch, however has a chance of locking a player inside a wall and corrupting game data, especially if a player saves at this point, and if one finds a way to the Beginning Dimension and saves, they will be stuck until one starts a new game. Nintendo has acknowledged the glitches and has offered workarounds and methods of recovery.
