The way of the monkey staff is a monstatic tradition that allows you to use staffs as a main monk weapons even allowing you to summon monkey's to help you

Monkey Staff

When you choose this tradition at lvl 3 all staffs are considered monk weapons

You gain proficiency in performance and acrobatics

Choose one staff to be your Monkey Staff  this can be changed once per long rest

Monkey Staff

When you use Fury of blows for 1 ki while having Monkey Staff equipped you gain one additional attack with staff

1. If your Monkey Staff is one handed you can still use the bonus action to do an unarmed strike

 Your monkey staff starts at one dice higher then normal (1d6>1d8) 

With use of monkey staffs comes changes in your body such as excessive hair growth

Wholeness of Body

At 6th level, you gain the ability to heal yourself. As an action, you can regain hit points equal to three times
your monk level. You must finish a long rest before you can use this feature again. 

Advance Monkey Staff

At lvl 6Your Monkey Staff dice goes up one dice size,your Monkey Staff strikes count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Your Monkey Staff  has become a part of you to the point you call it and it returns to you

1. You can spend 3 ki and throw your staff 20ft for normal damage+monk lvl, even on a miss it returns to you 

The changes in your body are more noticeable now. Rounded ears, some even start growth of a tail

Monkey Staff of Summoning

At lvl 11 For 1 ki point you can hit the ground and summon 1 ape to fight along side of you and are dismisses after an hour you can do this three times a long rest; can only have 2 at once until higher lvls

1. Number of apes summoned at one time depends in the amount of ki spent 
2. At lvl 11 max apes is 2, 3 at lvl 17, and 4 at lvl 20
3. At lvl 17 apes stay until dismissed or destroyed

 

Monkey Staff dice size increased one size

Your monkey form has increased to a point where you can run faster and jump higher increase both speed and jumping distance by 20ft, 

1. You can make a sweep attack with your monkey staff that hits 10ft all around you, if successful, opponents take damage + monk lvl and must make a strength saving throw  or fall prone, 

Master Monkey Staff

Reaching lvl 17 Mastery of the monkey staff has been reached your moves are fluent and graceful, also more deadly and accurate

For 3 ki you can summon a giant ape creature to fight with you, giant ape is under  your control until you dismiss or it dies

Monkey Sage - before you attack use 2 ki point to enter Monkey Sage and do double damage and take damage for one turn, 

Monkey Staff dice goes up one size (if it would go past d20 add only 1d4)