Twister? Seriously?

Exeggutor -> grass type Gyarados -> water type hehe

Let's define set $P = \left\{\text{Vaporeon},\text{Snorlax},\text{Gyarados},\text{Exeggutor} \right\}$ (pets) and function $s: P \mapsto \mathbb{R}$ (strength).

"My Vaporean is stronger than my Snorlax, but is weaker than my Exeggutor." tells that $s\left(\text{Exeggutor}\right) > s\left(\text{Vaporeon}\right) > s\left(\text{Snorlax}\right)$ .

"My Snorlax is neither the strongest nor the weakest of these four." tells that $\exists p \in P : s\left(\text{Snorlax}\right) > s\left(p\right)$ .

These imply that $s\left(\text{Snorlax}\right) > s\left(\text{Gyarados}\right) \implies s\left(\text{Exeggutor}\right) > s\left(\text{Gyarados}\right)$ .

Hence, $\boxed{\text{Exeggutor}}$ is stronger.

If we assign ranking numbers to each (something I like to do for these problems) with 4 as the strongest and 1 as the weakest, Snorlax cannot be 1 or 4. If there are two "pets" above Snorlax, that would mean that Snorlax is rank 2, with Exeggutor and Vaporean in ranks 3 and 4. (It doesn't actually matter how the two occupy those ranks.) This leaves rank 1 for the sole remaining "pet", Gyrados. 1 is weaker than 3 and 4, so the Exeggutor is stronger.

Step 1: Vaporean is stronger than Snorriax ............... V>S
step 2 : Exeggutor is stronger than Vaporean ............E>V>S
Step 3: Snorieam is nor the weakest of these four......E>V>S>G
Conclusion : Exegguor is stronger

Solution 1-Exeggutor is a grass type and Gyrados is a water type. Grass beats water.

Solution 2-Snorlax is either second or third. The first hint tells us that it is third. Gyrados is last and Exeggutor is first

Woo hoo!

Another Pokey Mango question! :0)

Well pokemon go is certainly on a roll..! Well done!! :D

From strongest to weakest

Exeggutor Vaporean Snorlax Gyrados