Prepare yourselves for a bunch of questions lol...
-What is the importance of shield dropping w/ fox and what are my options with it?
it enhances your platform game and mobility. if people do something punishable on shield when you're on a platform, shield drop back air, forward air, and shine can hit them as you fall. you can also use shai drops (running shield drops) to do quick aerials near the ground if needed.
-What is the best way to start adding mixups to my play? (I feel like i do the same combos most of the time)
i'm not going to act like i'm a great player or anything, so don't take my word for gold. i'm also assuming that you mean mixups in your combos, since most people would likely think you're referring to mixups in neutral in any other context. i think recognizing your options and knowing how to piece them together is the key. keep other people's DI and ASDI, along with other things in mind when you do your combos, but when you figure out how to connect your moves, do whatever works.
-When is it good to up-smash out of shield?
when people do something really lag on your shield and you don't have better options. sometimes it could be better to waveshine until you can KO with up smash, sometimes you can get KO's if people are at a high enough %. you can also up smash OoS if you don't think people are being good enough with their shield pressure to prevent you from doing it.
-What can i follow-up with after i up-thow up-smash someone at low percent? (What is the best punish?)
it depends on the character, DI, and %. you can usually get an up air or back air easily. sometimes you may be able to get fair, nair, or shine to connect. you might even be able to get down tilt on fast fallers.
-Is Cpt. Falcon the same weight as fox and falco? What are my options when I up-throw falcon at low to mid percents?
fall speed and weight are different. captain falcon falls almost as fast as the spacies, but he's much heavier, so he'll die at higher %'s. i know up tilt can hit falcon. i think nair hits him as well. fox might have a chaingrab on falcon at some %'s, i'm not sure about this though. just so you know, falco is slightly heavier than fox.
-What is the timing to powershield falcos lasers?
when they're about to hit you. if you're moving toward the laser, you have a slightly longer window to powershield since you will still have momentum if you shield out of a run.
-What are the different ways to put pressure on someone in game? (Dash dance, lasers, etc)
using your dash dance to make people uncomfortable is good, as it makes your threat zones fluctuate. performing mixups and showing that you CAN do them will make people respect all of Fox's options. lasers are good as long as you do them when you aren't vulnerable.
-What are the most useful fox techs?
movement techs (shai dropping, wavedash, having control over dash dance lengths, shffl), jump canceled grab, waveshine, edge cancels, multishine, short hop double laser, doing anything out of shine, shine out of shield, pivoting, and being able to do the invincible ledgestall with firefox are all useful. since you seem to be new, just make sure your movement, jump cancel grabs, and waveshines into followups are decent. everything else is definitely useful, but not as necessary. HAVING GOOD DI (as well as shield DI and SDI) IS ALSO IMPORTANT.
-How can i improve my neutral game and spacing with solo practice when playing fox?
shadowboxing
-How do you guys warm up and mentally prepare for tournaments?
i practice my tech a bit before i go and do my best. i could go on about how somebody could do that, but it depends on the individual and playing the best you can is the most important part anyway.
-When i shield falcos lasers, why is it good to wd OoS? If Falco is approaching with lasers and I shield them what should i do?
i haven't used this much because i'm not that good. i've heard that it creates space between you and your opponent when you wavedash OoS in general, which prevents you from being stuck in your shield.
Thanks