I have finished most of Dino Domain, but I haven't found the key to the locked door in Dino Domain.
What track is the key hidden on? Where on the track do I need to look?
The Dino Domain key is hidden on the Ancient Lake track.
It's located at the very beginning of the track off to the right hand side. It will be floating on an inclined ramp.
This video will show you where:
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I was playing Diddy Kong Racing DS, and noticed these coins:
I happened to pick one up, but I have no idea what they are for, much less how to use it.
What can I do with this coin? It seems like I can only have one at a time.
The coins with an up arrow on them are upgrade coins.
These coins are activated by pressing 'X' and will upgrade any weapon or item you are currently equipped with. Weapon and items are found through the numerous balloons scattered throughout the course.
Upgrades are as follows:
Red Balloons: Missile Shield
Blue Balloons: Autopilot
Green Balloons: Rare Coins
Yellow Balloons: Invisibility
Rainbow Balloons: Radio Missle
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I've heard the collecting bananas increases your speed, is this true? As I don't seem to speed up when I get a bunch. Although that may be because the speed of each one is too subtle to notice.
They do marginally increase your speed, but I have never noticed it being that much of an increase. Also, the increase stops at ten bananas - you can theoretically collect more than that, but they won't help you.
As Toomai pointed out in comments, you can use the VITAMINB cheat, which allows you to collect an unlimited amount of bananas.
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I can't beat the boss of the first world.Aare there any specific tactics I should use, Such as charging the boosts and rockets, or firing off the level 1 versions? Does he speed up if he's behind me, or does he slow down if I get too far behind?
He does slow down quite a bit right before the finish line, so that is a good spot to overtake him if you are close behind him. Other than that, his speed doesn't really vary, ahead or behind.
Also, try not to let him step on you - when you are flattened, you lose a lot of valuable time.
There is also a shortcut of sorts that you can use - it is marked by a set of bushes. You can also recognize it ahead of time by the rock outcropping and a blue balloon nearby.
If you get the boost at the start, you'll be ahead of the Triceratops.
Also, if you are behind the Triceratops, homing missiles are a good way to get ahead of him.
Getting the blue balloons (if possible, some of them can be tricky) are your best bet to get ahead of him quickly, and to extend your lead once you have it.
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