Here's a post (boxing mini-guide) from INdy83 over at
IGN's Wii forums.
"I have seen it over and over and over again, complaints about how Wii boxing isn't responsive or sensitive enough yadda yadda yadda... I just beat my trainer and am currently at 1800 something points... after a VERY frusterating learning experience, as the training doesn't teach you how to play.
Basics.
Wii boxing is the most complex of the sports on the disc, utilizing ALL of the mechanics introduced in the other titles, plus some more.
the biggest one: TIMING.
Then there is acceleration
and movement/positioning
Punching
1. Power
There are 3 levels of power to each punch, weak (but fast recovery) medium, and Strong (Power punches)
Weak punches have the fastest recovery time, meaning you can attack again very quickly, with proper timing your first glove should be ready to go again after you use the other glove. These should be used for starting combos, as a hit lets you continue, and a miss or block wont leave the blocked glove 'stunned' it just comes back
Medium punch, these do more damage than weak punches, but also take some time to recover, if you haven't caught on yet, if your glove is recovering you can't use it to punch. These are good to begin ending combos with, for the good old one two punch.
Power punches: These are the ones you all love to land, with the satisfying sounds coming from the speaker, and the red collision graphic appearing. These also have the longest recovery rate, and missing or getting blocked on a power punch leaves you open and your glove useless for what seems like forever.... Ideal for finishing combos, taking a fresh opponent down in one combo ending with a power punch is a garunteed KO... of course, this applies to you too. It does not take a lot to activate a power punch, as Nintendo has purposely set all max power levels to a rather low acceleration requirement to avoid people breaking things.... most people I see ONLY use power punches, which always leaves the gloves in recovery afterwards, which brings on complaints of lack of responsiveness.
These 3 levels of power apply to ALL punches.
Straight punches, just move the remote forward, you can actually control the angle of your punch, but it is REALLY sensitive, so starting off, just position yourself by leaning and throw perfectly straight punches. You can punch the head, chest, or gut by adjusting your glove position BEFORE throwing the punch.
Hooks: To perform a hook, simply move the controller left or right in a straightline, don't try to emulate a hook (I know, wah, get over it, I did) more powerful than straight power punches.
Overhand: Perform the hook motion when your glove is at it's highest position. Truly Devastating
Body Hook: Have your glove at body level and perfom the hook motion
Gut hook: Have your glove as low as it will go and perform the hook motion. These Hurt.
All hooks have longer recovery times than straight punches, and they take longer to hit. I suggest not overusing them, or making sure they are in the middle of a combo as they can be countered easily, and painfully. If a hook gets blocked or missed, that side of you is pretty much boned.
Uppercut/gut buster. Simply move your remote up. if your glove is down at body level, it's a gut buster, if it's higher, it's a chin smashing uppercut. Hard to land, but definately satisfying. Unless you have already hit your opponent, and they moved thier gloves in pain, or their gloves are no where near there face this will probably get blocked.
blocking: Blocking is pretty straightforward, to block a punch simply have your glove positioned so it intercept your opponents. In order to block hooks your glove must be out to the side... THis also means in order to score a hit, you have to expose a part of your body or face so that your punch wont be blocked. Also, when you block a punch, the glove used to punch with will be in recovery for a breif moment, use the other glove to counter the side of your opponent you blocked. Straightforward but definately not simple and easy.
Dodging. There are three dodges
Weaving: Angle both controllers towards the side like you were leaning.
Ducking. Angle both controllers forward, this can duck high punches, but you are begging for a brutal uppercut.
Lean back, lean both remotes back, and you will lean back, you can still get hit, but proper timing can make this very useful.
Matrix dodges: Dodge from on direction and then quickly switch to another to enable matrix counter mode, made noticable by a disrupted air flow around you, should an opponent miss you during this time, time slows down and you have a few brief seconds to land a devastating counter attack.
Hope this gets some people trying boxing again."