5 day run
A 5 day run is where a player completes Pikmin 2 in 5 days by collecting all 201 treasures. This is achieved by using various exploits and glitches to unlock most Pikmin types earlier than intended, and completing the Awakening Wood, Perplexing Pool, and Wistful Wild in a single day each.
A 5 day run is probably impossible on the New Play Control! version of Pikmin 2. Because the Blue Pikmin don't respond to the leader's whistle on day 2, getting Blue Pikmin early is a lot more time consuming, and since the player starts the day with few Pikmin, there's not enough time in the day to do all the required tasks.
The following is a brief outline of a 5 day run. The order of some days can be moved around – for example, after the Awakening Wood, the player can either finish the Valley of Repose or tackle the Perplexing Pool. What matters is that the debt is repaid at the end of the third day.
Before the run can even start properly, some glitches must be performed. Start a new file and perform the day 1 extinction glitch to end the first day. Do not save the game. On day 2, use the Pikmin to kill the Dwarf Red Bulborb at the landing site, and while the enemy's soul is in the air, open the pause menu and end the day. Doing this will set up a glitch called cutscene timer storage, which is essential for the actual day 1. At the end of the day, select "Start over from last save" to start the game from day 1 again.
Note: All overground treasures must be collected before completing the final caves so that you can clear out the area before the day ends. This is because the debt clearing cutscene (which can only happen while above-ground) instantly ends the day.
The first few recorded low day runs collect all treasures in 8 days. These runs have few major glitches, and simply go through all eight milestones in the order intended by the developers:
Though smaller glitches and tricks were found in the meantime, the lowest number of days required to collect all treasures was kept at 8 for several years.
On June 30th, 2012, Claris discovered the seesaw block glitch (then called "scale glitch"), which allowed for Blue Pikmin to be unlocked in the first visit to the Awakening Wood. This removed one day from the total, since players can use the Blue Pikmin to complete the Perplexing Pool in a single day. It was still necessary to return to the Awakening Wood in a different day, since one needed to use Yellow Pikmin to open up the electric gate and retrieve the Decorative Goo.
On July 2nd, 2012, the first 7 day run was completed, also by Claris.
On March 24th, 2018, "muratsubo" discovered a glitch that allows Pikmin to carry an object at much faster speeds than normal. Over the next days, speedrunners attempted to find time-saving uses for the glitch, and the idea of using it to get the Decorative Goo over the gate was instantly brought up. Several experiments were made to get it to work. Eventually, it was proven to be possible to bring the Decorative Goo outside of the Blue Pikmin den without needing Yellow Pikmin, provided the treasure is "charged" with enough speed or luck.
On April 2nd, 2018, "HSS0136" used that same glitch and completed the entirety of the area in the same day. This knocked the day total from seven to six.
At this point, all areas took a single day to complete, except the Valley of Repose which took 3. Efforts shifted towards finding a way to access the Emergence Cave on day 1, as that would allow unlocking Purple Pikmin to collect the Spherical Atlas to unlock the Awakening Wood early. In January 2021, "HSS0136" discovered that by using the Cutscene Timer Storage glitch, the player could switch to Louie on day 1 before defeating the Dwarf Red Bulborb in the landing site, and then "依代 九朔_Vtuber" found that it was possible to use that same Dwarf Red Bulborb to clip up a ledge, allowing the Emergence Cave to be accessed on day 1. This made it possible to complete the game in 5 days. Using the new strategy, "TRR" completed a tool-assisted demonstration of the route on February 2nd, 2021, but the extreme difficulty of the clip up the ledge made the run difficult to do perform in real time. On March 4th, 2021, "HSS0136" became the first person to complete a full 5-day run, combining it with a low Pikmin count of 102, and with no Yellow Pikmin.