Quote from James49478 >>

Even  the Titan's Thunderous Bellow would not help the Tarrasque against Tiamat.  Flight gives her the ability to stay in it's read quarter away from the bellow and continue to hit it from behind.

 
For the purposes of 5e combat there is no “rear quarter”; the Tarrasque can aim the Bellow anywhere along its border.

More versatile bosses that tend to not die instantly, it hink make for funner and better bosses. but mostly it boils down to how the DM does it, how well they can flavor it and make the players have fun. The creatures are just catalysts for good DM's

Quote from SentientSteel >>

Yes, the Tarrasque would get bodied by so many creatures and player types, and I realised this a long time ago, and since i really wanted a large brute-beast, i made the tarrasque a true titan... something to REALLY be feared... so, I present to you

Tarrasque, True Titan



Though after reading all this cool lore and stuff from 1e, i might wanna bring it back for my revamped version of the tarrasque.

 

 If you're rolling a D20 and it's strength modifier is 10 does the "overwhelming strength" ability mean it always gets a 30

Quote from SentientSteel >>

Cant it stun with its Thunderous bellow? And can't it reliably go before Tiamat? Surely that's enough to tip the edge?

 also Tiamat will stay in the air if she gets stunned due to the hover ability but she can still be hit by it. I still think that Tiamat is stronger though.

Quote from KthunkTheBarbarian >>

I'm back! Elder Brain Tarrasque stats! yay!

 

 first of all dose the Tarrasque barf up the people that get converted into mind flayers, second of all yay! the Tarrasque isn't stupid anymore