- You may be looking for Drill Eggman II, the boss of the Mystic Cave Zone, or the Drill Mobile from the Marble Garden Zone.
Drill Eggman (ドリルエッグマン Doriruegguman?), also called Egg Mobile-D or Egg Mobile Drill Machine-shiyou (エッグモービル・ドリルマシン仕様 Eggumōbiru Dorirumashin-shiyō?) in the Sonic Advance Hisshō Perfect Guide, is the first boss encountered in Sonic the Hedgehog 2, appearing at the end of the second act of the Emerald Hill Zone. It later made appearance as one of the mid-bosses in X-Zone of Sonic Advance. In both games, it is piloted by Dr. Eggman.
Drill Eggman is a predominantly red and grey armoured dune buggy-like vehicle that runs on four wheel drive. Its main features include a large spinning Drill on the front end of the machine, sharpened spikes on its hubcaps, autopilot, effective off-road capabilities, and the ability for its chassis to link with the Egg Mobile to provide both a cockpit and a makeshift escape pod in case the main chassis is destroyed. The Drill is capable of functioning as a long-ranged but somewhat slow projectile weapon, as it can be launched from the front end towards the player. The front of the vehicle bears resemblance to a mole.
Sonic the Hedgehog 2
Robotnik landing to the vehicle at the start of fight.
Emerald Hill Zone Act 2
Large drill vehicle moving around the uneven terrain. The player has to hit eight times to defeat it.
Drill Eggman is known to be first boss featured at Emerald Hill Zone Act 2 in Sonic the Hedgehog 2. The battle takes place on arena with palmtrees and slightly uneven terrain. At the beginning of the boss fight, Doctor Robotnik arrives in his Egg Mobile (which unusually flies by means of helicopter-style rotor blades), which attaches to the drill vehicle. Robotnik then proceeds to drive the drill car back and forth across the screen.
Robotnik is vulnerable to a simple Spin Attack on his head. The player is able to hit from behind, while the player has to watch out the drill part. After being hit six times, the doctor laughs and shoots the drill-bit straight off the car. Two final hits are required to destroy the machine, after which the scientist detaches his Egg Mobile from the vehicle and flies away. The player can then open the zone's capsule and complete the level.
Eggman's Egg Mobile-D in X-Zone.
The return of the drill machine with same features. The player has to hit four times to defeat it.
However there are slight differences now. In the beginning of the fight, Eggman is already seen in the Egg Mobile-D, when it arrives to the battle arena. The arena itself is completely flat, which makes the fight even easier. This version takes only four hits to be destroyed, while like in Sonic the Hedgehog 2, it shoots its drill part towards the player just before the final blow. After destroying the Egg Mobile-D completely, Dr. Eggman flees, allowing the player to progress further in the X-Zone and to the the latest weapon, that Eggman has prepared for the last.
Adventures of Sonic the Hedgehog
In the Adventures of Sonic the Hedgehog episode "Subterranean Sonic", the loosely similar mobile with four large wheels and large drill claw is seen to be pilot by Grounder. It is created by Doctor Robotnik.
- In Sonic Jam compilation, Drill Eggman is one of three bosses that the player will encounter in the easy mode of Sonic the Hedgehog 2. While having identical attack pattern, it only takes three hits to defeat it.