Editing Another Part Found

A bridge by the start of the mission needs to be built before progress through the Oak can be made, so you should turn the 10 Red Pikmin you're given into Yellow Pikmin with the Candypop Buds, then turn them into flower Pikmin using the nearby egg and set them on the electric gate guarding 30 bridge pieces to build it as soon as possible. While they work on the gate, use that time to use the 5 Rock Pikmin to break the large crystal and start carrying the 20 bridge pieces behind it under the [[Arachnode]] web. You may even throw a leader into the web to lure the creature down if you wish. Once the electric gate is busted, those Yellow Pikmin along with the 10 Red Pikmin behind it should work on carrying the 30 bridge pieces. Once the Yellow Pikmin finish working on the bridge they can take out the Arachnode with ease. You can use your Rock Pikmin to help if things go wrong or you can use them entirely beforehand if you used that leader bait trick. Now you may begin to carry the Chronos Reactor across the bridge.

Once you get past the bridge, the large crystal right past it should be the first priority as 5 Red Pikmin as well as 2 Rock Candypop Buds lie beyond it. It can be useful to convert 5 or 10 Red Pikmin into Rock Pikmin for the upcoming obstacles. You should now be able to use these to take out the enemies situated before any walls or bags and use the eggs around to power up your Pikmin, as well as pushing down the paper bag as a shortcut for later, though do take the 5 Red Pikmin recruits waiting behind it by the electrical gate. In fact, be sure to spot out and use any eggs hiding on the ledges of the area. What lies past the dirt wall is an Orange Bulborb and a Dwarf Orange Bulborb, the larger containing a bomb rock and both guarding 5 more Red Pikmin, so they should be taken on when you have a solid amount of Pikmin to take the big one down. Assign a couple of Pikmin on your way to begin working on the wall if you need those resources.

Your Pikmin for some reason will not carry the Chronos Reactor down the paper bag, so you must take it the other way past the reinforced wall. Your focus should now lie in destroying the nearby crystal wall, as it contains a batch of 10 Yellow Pikmin as well as a hole with 3 bomb rocks. Once you reach the crystal wall, you can assign some Pikmin to digging up the bomb rocks and others to start carrying the part. The 3 bomb rocks should be used straight on the reinforced wall. You should also be able to take on the Orange Bulborb mentioned earlier with ease, so do that and continue onwards past the paper bag. Make sure you have one leader to stop the Chronos Reactor before it falls into the jaws of the Bulbear and its jawless Skutterchuck cohorts.

It's recommended to take on this next part from the side from the paper bag as it will be easier to isolate the Bulbear from the Skutterchucks from that angle. Carefully take out the Skutterchucks, then you can use your bomb rock from the Orange Bulborb to assist in taking out the Bulbear, who will drop 2 more. After taking them out, you can begin digging out more bomb rocks from the nearby hole, taking the 5 Red Pikmin trapped behind them, and continue taking the part. It's a good idea to avoid taking down the electric wall to the left and just carrying the Reactor down the ledge whist dropping down yourself and using the bomb rocks to take out the Whiptongue Bulborb and Orange Bulborb, using what you have left between yourself and the nearby hole if necessary to take down the last reinforced wall.