Of course, while
I have experienced all of these bosses from a different perspective to the rest of the posters here. This a matter close to my cold iron heart, so I shall make my own contribution.
First of all,
every single ancient evil I have awoken that has rebelled against me. Honestly now, it's ridiculous. With all the times these creatures have destroyed my bases (the ruining of Eggman Land still pains me to this very day) it is a suprise that none of them have managed to finish off the hedgehog. Don't even get me
started on the trouble I made for myself when I released Shadow the Hedgehog from Prison Island all those years ago...
Although, I am pleased to see that many of the creations I have used to combat Sonic have appeared on these numerous forum posts. My personal eggmobile is so very versatile, truely a marvel of modern science. But, I digress, the boss machines that I take the most pride in for providing you all difficulty are as follows.
Sonic 3 final boss
A machine that can remove the rings from
Super Sonic? Brilliant! Of course, while this was a useful strategic advantage, it was incredibly situational as it required the combined kinetic force of both my machine slamming Sonic onto the floor and the Death Egg rising to greet him. As such, I could not repeat this effect when I used the same robot to combat Knuckles.
The Drill Car
Ah, my beautiful Drill Car. This boss machine holds a lot of sentimental value to myself as I used it for practical purposes before the Emerald Hill incident in which it was destroyed... Before the events of Sonic 2, I was not a well known criminal master mind as my first invasion was a test that took place only on South Island. So in order to test the infamous Drill Car, I drove through New York with it. During rush hour. I was never as delighted to see traffic in my entire life.
Metal Sonic
Goes without explanation really, aside from the Heroes incident, this robot has been an extremely useful asset to my repertoire of tools. Being extremely versatile in all fields of work, from kidnapping pink hedgehogs to engaging in hand to hand combat. (I see my 'Sonic the Fighters' Metal has been mentioned several times in this thread, eggsellent)
Of course, in due time, you will face my most versatile creation in SRB2.
Eventually.
Of course though, the most difficult boss for
myself without a doubt, would have to be Sonic the Hedgehog himself. All the times he has defeated my many great creations... But, regardless. With Sonic 4 and Sonic Colors coming soon, I will get him next time
for sure.
Also, before I forget... I have a bone to pick with you Shardvex.
The srb2 Boss in Greenflower Zone 3. (Joke.)