Sonic VS Monster from the Underground

From Sonic Retro

SonicX 48 JP TitleCard.jpg
Sonic X episode #48
"Sonic VS Monster from the Underground"
Written by:
Directed by: Mihiro Yamaguchi
Production no.: 048
Original airdate:
Country: Japan

Sonic VS The Underground Monsters is the 48th episode in the first season of Sonic X. In the English dub, it is known as The Volcanic Venture.

Episode Summary

After his defeat in the last episode, Dr. Eggman has fled into the volcano at the world's bellybutton. Sonic and his allies prepare to pursue him with the X-Cyclone. Rouge is reluctant to go underground at first (it would ruin her skin, and it's much more a task for an echidna) but when Mr. Tanaka uncovers a sample of harahirecon--a beautiful gemstone material used by the ancient Murasians--she becomes much more enthusiastic.

Sonic, Knuckles and Rouge find the dirt inside the volcano to be unstable, so they make slow progress through narrow passages rather than tunneling. After travelling past lava flows and through an underground river, they arrive at an underground city of Murasian ruins, lit by an artificial sun made of harahirecon. Professor Atsumi explains that the Murasians attributed their city's demise to a dragon god, which doesn't scare Rouge or Knuckles in the least.

Eggman is camping in the ruins, and sends Decoe and Bocoe to forage for food. They find what appears to be a large red fruit, but it is actually the end of a massive moth's antennae. Chris tries to help the fleeing robots, but all three of them fall into a deep pit and land right at Eggman's feet.

Meanwhile, Professor Atsumi and Chuck watch for signs of the volcano's activity. The volcano serves to let off pressure on the world's bellybutton, and it is due to erupt soon. They advise Sonic and his friends that they will have to leave soon to avoid the eruption. Sonic and Rouge head off to find Chris as Eggman zeroes in on the location of the world's bellybutton. As he prepares to set a detonator, Bokkun arrives in a panic, leading a massive, ancient drill robot that emerged from the volcano. Eggman and Bokkun escape, leaving Decoe, Bocoe, and Chris behind with Rouge as the volcano begins erupting. Rouge's attacks are ineffective, so Chris runs to the detonator and tries to lead the robot to him.

Decoe and Bocoe decide it is time to repay Chris for his help against the moth. For a moment, they plan on transforming into a large and impressive mech...but when they attempt the feat, they find that they can't actually do it. The robot knocks them into pieces with his tail as Sonic, Tails, and Knuckles arrive in the X-Tornado. Sonic plants the detonator, and the robot explodes, triggering the volcano. Sonic and his friends all escape to Chris' boat, though for the moment, it seems that Decoe and Bocoe were unable to leave in time.

As the friends consider the robots' apparent sacrifice, Chris calls their names in a mournful gesture...and they emerge from the back of the boat with Tails and Chuck, who have brought them along and repaired them. They express their gratitude and declare that they are fed up with Eggman's selfishness--and they are leaving him!

Eyecatch Cards


Information icon.svg
Trivia sections are bad
Try and incorporate this information into the main article. See the manual of style to find out why.
Sonic X Season 1, Episodes 27-52
Sonic X logo
The Beginning of the Disaster | The Puzzle of the Liquid Life Form, Chaos | Amy the Captive | Egg Carrier Battle | Gamma the Wanderer | The Scream of Perfect Chaos | The Puzzle of Project Shadow | Sonic the Fugitive | Escape From Prison Island | Threat From Outer Space | Space Colony ARK Battle | Maria's Request, Everyone's Request | The Chaotix Detective Agency | Eggman Corporation | We Can See the Light! | Amy, Love's Escape Journey?! | Huge Home Electronics Panic! | The Ridiculous Epic Spy Battle | Sonic Battle - Face Off!! | Sonic Battle - Finale!! | Decisive Battle on the Equator!! | Sonic VS Monster from the Underground | The Day the Earth Stood Still | Morning of Farewells | Chris' Long Journey | Memories of the Wind