If you want to play this deck are but not with my exact build there are alternatives. The unchangeable core of this deck is made up of the three playsets of Evolve Creatures. Taking these out will remove this deck's core synergy. I'd advise you not to do that. Built on these Evolvers I have added two general strategies of getting evolve triggers. The first is just playing high power 1-drop creatures that destroy themselves. The second is the combination of Undying creatures with Pongify Effects. You could take out one of those two strategies if you want to add more homogeneity to your deck. Then there are your Finishers and your Mid-Game Cards. Those categories are useful but also completely optional. Now here are some cards you could use instead.
Evolvers
Bloodhall Ooze is not strictly an evolver but nonetheless gets bigger every turn we have a green creature on the battlefield.
Shambleshark allows for some instant evolve triggers. Whether it's worth twice the price of your regular evolvers is up to you.
High Power
Narnam Renegade is cheap and with our Fetchland will almost always have 2 power. Deathtouch means that it always trades profitably. For a creatures that primarily evolves other creatures 2 power is unfortunately not that high and it doesn't do anything the turn it enters the battlefield.
Greenbelt Rampager must be played 3 times before it sticks which means, your creatures will evolve up to 3 times. Don't play Aether Hub with it though because once its energy runs out, it becomes useless because we don't have generic mana in our costs. This card is also rather expensive before it sticks.
Bayou Groff is very Similar to Pongify and Rapid Hybridization but more expensive and less flexible. The ability to evolve your creatures to 5 power and the possibility to cast it for 5 mana make this card better in some situations.
Goblin Guide costs 1 mana, has 2 power and attacks immediately. An early creature that triggers our fresh evolvers and keeps swinging.
Zameck Guildmage lets you remove the +1/+1 counters from your undying creatures to draw cards and boost creatures entering the battlefield to give your board one more round of evolve triggers.
Skyrider Elf is a 2/2 or 3/3 flyer depending on what you need to evolve your creatures. The evasion helps around difficult board states.
Spark Elemental is a cheaper variant of Hellspark Elemental or a weaker Vexing Devil that can also be targeted by a pongify.
Avatar of the Resolute is a surefire way to trigger evolve, become a huge threat itself and blocks flyers as a hobby. It doesn't do anything the turn it enters the battlefield though.
Frost Walker has 4 power for only 2 mana. It triggers evolve and will stay on the battlefield. Unfortunately it dies to anything that targets (Including Pongify Effects) and to any 1/1 creature.
Imaginary Pet is resilient and can be bounced repeatedly to evolve your creatures again and again. You will never play it on turn 2 though and you never want two copies in your hand.
Kari Zev, Skyship Raider is hard to block and creates a token each turn. That way it can evolve our creatures each turn to up to 2 power. Also the token can be easily targeted with a pongify effect. Also very good with Atarka's Command. The evolving power is relatively low and no haste means you can get blown out by cheap removal.
Lupine Prototype has insane stats, is flexible with its mana cost and it will definitely trigger anything with evolve. its slow though and it will just be sitting duck on the board until your hand is empty.
Rhonas the Indomitable has 5 power and is immune to the destruction through your pongify effects. The condition for him to be able to attack is sometimes too difficult to fulfill though.
Boon Satyr can be flashed in at any point tp evolve your creatures to 4. It also has trample which has a nice synergy with your Pongify Effects. At 3 mana its rather expensive and you won't ever cast it with bestow.
Groundbreaker evolves anything and deals 6 damage the turn it enters the battlefield. The cost is pretty high and restrictive though.
Hooting Mandrills is a potential 4/4 trampler for 1 mana. The fewer you play the easier it is to use delve effectively. It might get into the way of Hellspark Elemental.
Pongify Effects
Beast Within works as any other Pongify effect exept you can also remove any Enchantment, Artifact, Planeswalker or Land standing in your way. Also Experiment One can regenerate off of it. It's rather expensive though.
Mid Game
Inspiring Call allows you to lean back and swing with your creatures, if a blocker or a removal appears it will draw you cards and save you the board. The downside is that it is expensive and that it doesn't do anything offensive by itself.
Finishers
Vapor Snag is the ideal bounce spell if you need one. Against Combo or Control this will be a completely dead card in your hand though.
Unsubstantiate is a bounce spell that doubles as counterspell. this is never a dead card in your hand and it even delays Supreme Verdict for a turn. But it's rather on the expensive side for this deck to keep mana open.
Simic Charm is very flexible. It can deal additional damage as well as get rid of a creature as well as protect our evolved beaters. But again 2 mana is a high cost to keep mana open.
Nissa, Voice of Zendikar can activate an immediate mini-overrun or produce plants as targets for you Pongify effects. 3 mana is steep though.
Gaea's Anthem buils upon your advantage of high stat creatures but is expensive and does nothing on its own.