Here is mission 4: Reach the goal within 7 minutes and 0 seconds for Cannon's Core.
Pretty easy fourth mission. Just don't die and destroy as many enemies as you can with Tails and Eggman, and also get many combos with them as well. You should have near enough score by the time you finish with Sonic, and the extra time bonus will kick in to get you an A rank.
Score needed: 29000 points
Time needed: 7:00
![](https://s2.save4k.ru/pic/itKam62YeIc/maxresdefault.jpg)